+++ /dev/null
- 2/14/2011
- ---------
-[bash-4.2 released]
-
- 2/15
- ----
-lib/glob/gmisc.c
- - fix wmatchlen and umatchlen to avoid going past the end of the
- string on an incomplete bracket expression that ends with a
- NUL. Partial fix for bug reported by Clark Wang <dearvoid@gmail.com>
-
- 2/16
- ----
-subst.h
- - new string extract flag value: SX_WORD. Used when calling
- extract_dollar_brace_string to skip over the word in
- ${param op word} from parameter_brace_expand
-
-subst.c
- - change parameter_brace_expand to add SX_WORD to flags passed to
- extract_dollar_brace_string
- - change parameter_brace_expand to use SX_POSIXEXP for all non-posix
- word expansion operators that treat single quotes as special, not
- just % and #
- - change extract_dollar_brace_string to initialize dolbrace_state to
- DOLBRACE_WORD if SX_WORD flag supplied and we shouldn't use
- DOLBRACE_QUOTE. Fixes bug reported by Juergen Daubert <jue@jue.li>
-
-doc/{bash.1,bashref.texi}
- - document the exact expansions here strings undergo
-
- 2/17
- ----
-lib/readline/vi_mode.c
- - make sure that `dd', `cc', and `yy' call vidomove_dispatch from
- rl_domove_read_callback. Fixes bug reported by Clark Wang
- <dearvoid@gmail.com>
-
-lib/readline/callback.c
- - make sure _rl_internal_char_cleanup is called after the
- vi-motion callbacks (rl_vi_domove_callback) in rl_callback_read_char.
- Companion to above fix
-
-doc/{bash.1,bashref.texi}
- - make sure that the text describing the rhs of the == and =~
- operators to [[ states that only the quoted portion of the pattern
- is matched as a string
-
- 2/18
- ----
-lib/glob/gmisc.c
- - better fix for umatchlen/wmatchlen: keep track of the number of
- characters in a bracket expression as the value to increase
- matchlen by if the bracket expression is not well-formed. Fixes
- bug reported by Clark Wang <dearvoid@gmail.com>
-
-subst.c
- - change expand_string_for_rhs so that it sets the W_NOSPLIT2 flag
- in the word flags. We will not perform word splitting or quote
- removal on the result, so we do not want to add quoted nulls if
- we see "" or ''. Fixes bug reported by Mike Frysinger
- <vapier@gentoo.org>
-
- 2/19
- ----
-variables.c
- - new function, int chkexport(name), checks whether variable NAME is
- exported and remakes the export environment if necessary. Returns
- 1 if NAME is exported and 0 if not
- - call chkexport(name) to get tzset to look at the right variable in
- the environment when modifying TZ in sv_tz. Don't call tzset if
- chkexport doesn't indicate that the variable is exported
-
-variables.h
- - new extern declaration for chkexport
-
-
-{parse.y,builtins/printf.def}
- - call sv_tz before calling localtime() when formatting time strings
- in prompt strings or using printf. Fixes bug reported by
- Dennis Williamson <dennistwilliamson@gmail.com>
-
-execute_cmd.c
- - modify fix of 2/9 to add casts when those variables are passed to
- functions; some compilers throw errors instead of warnings. Report
- and fix from Joachim Schmitz <jojo@schmitz-digital.de>
-
-support/shobj-conf
- - add a stanza for nsk on the Tandem from Joachim Schmitz
- <jojo@schmitz-digital.de>
-
-{shell,lib/readline/shell}.c
- - Tandem systems should use getpwnam (getlogin()); for some reason
- they don't do well with using getuid(). Fix from Joachim Schmitz
- <jojo@schmitz-digital.de>
-
- 3/1
- ---
-variables.c
- - make sure that the return value from find_variable is non-null
- before trying to use it in chkexport. Fixes bug reported by
- Evangelos Foutras <foutrelis@gmail.com>
-
- 3/3
- ---
-parse.y
- - when adding $$ to the current token buffer in read_token_word(),
- don't xmalloc a buffer for two characters and then strcpy it, just
- copy the characters directly into the token buffer. Fix from
- Michael Whitten <mfwitten@gmail.com>
-
-execute_cmd.c
- - fix expand_word_unsplit to add the W_NOSPLIT2 flag to the word to
- be expanded, so "" doesn't add CTLNUL. Similar to fix of 2/18 to
- expand_string_for_rhs. Fixes bug reported by Nathanael D. Noblet
- <nathanael@gnat.ca> and Matthias Klose <doko@debian.org>
-
-parse.y
- - fix extended_glob case of read_token_word to allocate an extra
- space in the buffer for the next character read after the extended
- glob specification if it's a CTLESC or CTLNUL. Report and fix from
- Michael Witten <mfwitten@gmail.com>
- - fix shell expansions case of read_token_word to allocate an extra
- space in the buffer for the next character read after the shell
- expansion if it's a CTLESC or CTLNUL. Report and fix from
- Michael Witten <mfwitten@gmail.com>
- - TENTATIVE: fix read_token_word to reduce the amount of buffer space
- required to hold the translated and double-quoted value of $"..."
- strings. Report and fix from Michael Witten <mfwitten@gmail.com>
- - change code around got_character and got_escaped_character labels to
- make sure that we call RESIZE_MALLOCED_BUFFER before adding the
- CTLESC before a CTLESC or CTLNUL, and before adding the character if
- we're not adding a CTLESC. Report and fix from
- Michael Witten <mfwitten@gmail.com>
-
-subst.c
- - new param flags value, PF_ASSIGNRHS, mirrors W_ASSIGNRHS, noting that
- parameter expansion is on rhs of assignment statement. That inhibits
- word splitting
- - change param_expand to call string_list_dollar_at with quoted == 1
- if PF_ASSIGNRHS is set, so it will quote IFS characters in the
- positional parameter before separating them with the first char of
- $IFS. This keeps the rhs from being split inappropriately. Fixes
- bug reported by Andres Perera <andres.p@zoho.com>
-
- 3/4
- ---
-lib/readline/bind.c
- - add a missing free of `names' in rl_function_dumper. Bug report
- and fix from Michael Snyder <msnyder@vmware.com>
-
- 3/5
- ---
-lib/readline/rltty.c
- - change rl_deprep_terminal so it uses fileno (stdin) for the tty fd
- if rl_instream is not set, like rl_prep_terminal
-
- 3/6
- ---
-lib/readline/display.c
- - fix rl_message to use a dynamically-allocated buffer instead of a
- fixed-size buffer of 128 chars for the `local message prompt'. Bug
- report and fix from Micah Cowan <micah@cowan.name>
-
- 3/7
- ---
-jobs.c
- - add sentinel to wait_sigint_handler so it only sets wait_sigint_received
- if waiting_for_child is non-zero; otherwise, it restores the old
- SIGINT handler and sends itself the SIGINT
- - set waiting_for_child around the calls to waitchld that use it to
- synchronously wait for a process
- - change logic that decides whether or not the child process blocked
- or handled SIGINT based on whether or not waitpid returns -1/EINTR
- and the shell receives a SIGINT and the child does not exit. If
- the child later exits due to SIGINT, cancel the assumoption that it
- was handled
- - instead of testing whether or not the child exited due to SIGINT
- when deciding whether the shell should act on a SIGINT it received
- while waiting, test whether or not we think the child caught
- SIGINT. If it did, we let it go (unless the shell has it trapped);
- if it did not catch it, the shell acts on the SIGINT. Fix from
- Linus Torvalds <torvalds@linux-foundation.org>, bug report originally
- from Oleg Nesterov <oleg@redhat.com>
-
- 3/8
- ---
-shell.c
- - initialize no_line_editing to 1 if READLINE is not defined -- we
- can't have line editing without readline
-
- 3/12
- ----
-lib/readline/signals.c
- - add SIGHUP to the set of signals readline handles
-
-lib/readline/doc/rltech.texi
- - document that SIGHUP is now part of the set of signals readline
- handles
-
-lib/readline/input.c
- - if _rl_caught_signal indicates that read() was interrupted by a
- SIGHUP or SIGTERM, return READERR or EOF as appropriate
- - call rl_event_hook, if it's set, if call to read in rl_getc
- returns -1/EINTR. If rl_event_hook doesn't do anything, this
- continues the loop as before. This handles the other fatal
- signals
-
-execute_cmd.c
- - add a couple of QUIT; calls to execute_disk_command and
- execute_simple_command to improve responsiveness to interrupts
- and fatal signals
-
-input.c
- - rearrange getc_with_restart so that the return values from read()
- are handled right
-
-parse.y
- - don't need to set terminate_immediately in yy_stream_get, since
- getc_with_restart checks for terminating signals itself
- - since readline returns READERR on SIGHUP or SIGTERM, don't need
- to set terminate_immediately. Still doesn't handle other
- signals well -- will have to check that some more
-
-bashline.c
- - new function, bash_event_hook, for rl_event_hook. Just checks for
- terminating signals and acts on them using CHECK_TERMSIG.
- - set rl_event_hook to bash_event_hook
-
-builtins/read.def
- - take out setting terminate_immediately; add calls to CHECK_TERMSIG
- after read calls
-
-doc/{bash.1,bashref.texi}
- - move the text describing the effect of negative subscripts used to
- reference indexed array elements to the paragraphs describing
- ${parameter[subscript]}, since that's where they are implemented.
- Pointed out by Christopher F. A. Johnson <cfajohnson@gmail.com>
-
-arrayfunc.[ch],subst.c
- - array_expand_index now takes a new first argument: a SHELL_VAR *
- of the array variable being subscripted. Can be used later to fully
- implement negative subscripts
-
- 3/14
- ----
-lib/glob/glob.c
- - fix mbskipname to not turn the directory entry name into a wide char
- string if the conversion of the pattern to a wide char string fails
- - fix mbskipname to call skipname if either the pattern or the filename
- can't be converted into a wide-char string
-
-lib/glob/xmbsrtowcs.c
- - fix xdupmbstowcs2 to handle return value of 0 from mbsnrtowcs and
- short-circuit with failure in that case. Fixes bug reported by
- Roman Rakus <rrakus@redhat.com>
-
- 3/15
- ----
-bashline.c
- - new variable, bash_filename_quote_characters to store the value
- assigned to rl_filename_quote_characters so it can be restored
- if changed.
- - change bashline_reset and attempt_shell_completion to restore
- rl_filename_quote_characters if not set to default
-
- 3/22
- ----
-lib/glob/glob.c
- - wdequote_pathname falls back to udequote_pathname if xdupmbstowcs
- fails to convert the pathname to a wide-character string
-
-lib/glob/xmbsrtowcs.c
- - xdupmbstowcs2: change to fix problem with leading '\\' (results in
- nms == 0, which causes it to short-circuit with failure right
- away). Fixes bug pointed out by Werner Fink <werner@suse.de>
- - xdupmbstowcs2: compensate for mbsnrtowcs returning 0 by taking the
- next single-byte character and going on
- - xdupmbstowcs2: change memory allocation to increase by WSBUF_INC
- bytes; try to avoid calls to realloc (even if they don't actually
- result in more memory being allocated)
-
- 3/24
- ----
-doc/{bash.1,bashref.texi}
- - slightly modify BASH_SUBSHELL description based on complaint from
- Sam Liddicott <sam@liddicott.com>
-
- 3/25
- ----
-trap.c
- - change free_trap_strings to not call free_trap_string for signals
- that are being ignored, like reset_or_restore_signal_handlers.
- Fixes bug reported by Satoshi Takahashi <blue3waters@gmail.com>
-
- 3/26
- ----
-lib/readline/rltypedefs.h
- - remove old Function/VFunction/CPFunction/CPPFunction typedefs as
- suggested by Tom Tromey <tromey@redhat.com>
-
-lib/readline/rlstdc.h
- - move defines for USE_VARARGS/PREFER_STDARG/PREFER_VARARGS from
- config.h.in to here because declaration of rl_message in
- readline.h uses the defines. This makes it hard for another packages
- to use after the header files are installed, since config.h is not
- one of the installed files. Suggested by Tom Tromey
- <tromey@redhat.com>
-
- 3/27
- ----
-print_cmd.c
- - change indirection_string from a static buffer to a dynamic one
- managed by indirection_level_string(), so we don't end up truncating
- PS4. Suggested by Dennis Williamson <dennistwilliamson@gmail.com>
-
-lib/readline/shell.c
- - change sh_set_lines_and_columns to use static buffers instead of
- allocating the buffers to pass to setenv/putenv
-
-lib/readline/terminal.c
- - change _rl_get_screen_size to not call sh_set_lines_and_columns if
- ignore_env == 0
- - _rl_sigwinch_resize_terminal: new function to just retrieve terminal
- size, ignoring environment
-
-lib/readline/rlprivate.h
- - new external declaration for _rl_sigwinch_resize_terminal() (currently
- unused)
-
-lib/readline/signals.c
- - rl_sigwinch_handler: set _rl_caught_signal to SIGWINCH
- - rl_sigwinch_handler: don't immediately call rl_resize_terminal; just
- leave _rl_caught_signal set for RL_CHECK_SIGNALS to handle
- - _rl_signal_handler: call rl_resize_terminal if sig == SIGWINCH.
- Should fix hang when sending multiple repeated SIGWINCH reported by
- Henning Bekel <h.bekel@googlemail.com>
-
- 3/29
- ----
-lib/sh/snprintf.c
- - include math.h for any defines for isinf/isnan
- - use code from gnulib documentation to implement isinf/isnan if they
- are not defined
-
-configure.in
- - don't check for isinf or isnan; c99 says they're macros anyway
-
-config.h.in
- - remove defines for ISINF_IN_LIBC and ISNAN_IN_LIBC, no longer used
- by snprintf.c
-
- 4/2
- ---
-braces.c
- - brace_gobbler: fix to understand double-quoted command substitution,
- since the shell understands unquoted comsubs. Fixes bug reported
- by Michael Whitten <mfwitten@gmail.com>
-
-lib/readline/display.c
- - include <pc.h> on MDOS
- - get and set screen size using DJGPP-specific calls on MSDOS
- - move cursor up clear screen using DJGPP-specific calls
- - don't call tputs on DJGPP; there is no good terminfo support
-
-lib/readline/terminal.c
- - include <pc.h> on MDOS
- - get and set screen size using DJGPP-specific calls on MSDOS
- - use DJGPP-specific initialization on MSDOS, zeroing all the
- _rl_term_* variables
- - don't call tputs on DJGPP; there is no good terminfo support
- DJGPP support from Eli Zaretskii <eliz@gnu.org>
-
- 4/6
- ---
-
-config-top.h
- - change DEFAULT_PATH_VALUE to something more useful and modern
-
- 4/8
- ---
-tests/printf2.sub
- - make sure LC_ALL and LC_CTYPE are set so LANG assignment takes effect.
- Reported by Cedric Arbogast <arbogast.cedric@gmail.com>
-
- 4/11
- ----
-include/chartypes.h
- - fix a couple of dicey defines (though ones that don't cause any
- compiler warnings) in IN_CTYPE_DOMAIN
-
-doc/{bashref.texi,bash.1}
- - add note referring to duplicating file descriptors in sections
- describing redirecting stdout and stderr and appending to stdout
- and stderr. Suggested by Matthew Dinger <mdinger.bugzilla@gmail.com>
-
-pcomplete.c
- - it_init_helptopics: new function to support completing on help topics,
- not just builtins
- - it_helptopics: new programmable completion list of help topics
- - build list of helptopic completions in gen_action_completions on
- demand
-
-pcomplete.h
- - new extern declaration for it_helptopics
-
-builtins/complete.def
- - the `helptopic' action now maps to CA_HELPTOPIC intead of CA_BUILTIN,
- since there are more help topics than just builtins. Suggested by
- Clark Wang <dearvoid@gmail.com>
-
- 4/12
- ----
-print_cmd.c
- - fix print_arith_for_command to add a call to PRINT_DEFERRED_HEREDOCS
- before ending the body of the command, so heredocs get attached to
- the right command instead of to the loop. From gentoo bug 363371
- http://bugs.gentoo.org/show_bug.cgi?id=363371
-
-execute_cmd.c
- - change coproc_pidchk to unset the appropriate shell variables when
- the (currently single) known coproc pid terminates
- - cleanup and new functions to fully support multiple coprocesses when
- and if I decide to go there
-
- 4/13
- ----
-print_cmd.c
- - fix print_group_command to add a call to PRINT_DEFERRED_HEREDOCS
- after call to make_command_string_internal before printing closing
- `}'
- - fix make_command_string_internal to add a call to
- PRINT_DEFERRED_HEREDOCS after recursive call to
- make_command_string_internal in case cm_subshell before printing
- closing `)'
-
- 4/14
- ----
-print_cmd.c
- - change overlapping strcpy in named_function_string to memmove
-
-sig.h
- - UNBLOCK_SIGNAL: convenience define, same as UNBLOCK_CHILD, just
- restores an old signal mask
-
-trap.c
- - set_signal: instead of setting the signal handler to SIG_IGN while
- installing the new trap handler, block the signal and unblock it
- after the new handler is installed. Fixes bug reported by Roman
- Rakus <rrakus@redhat.com>
-
- 4/15
- ----
-doc/{bash.1,bashref.texi}
- - make it clear that enabling monitor mode means that all jobs run in
- separate process groups
-
- 4/18
- ----
-builtins/fc.def
- - update fix of 4/15/2010 to not take saved_command_line_count into
- account when stepping down the history list to make sure that
- last_hist indexes something that is valid. Fixes bug reported by
- <piuma@piumalab.org>
-
- 4/19
- ----
-builtins/fc.def
- - fc_gethnum: make sure the calculation to decide the last history
- entry is exactly the same as fc_builtin. Fixes bug uncovered by
- fix of 4/18 to stop seg fault
-
- 4/22
- ----
-lib/readline/terminal.c
- - change _rl_enable_meta_key to set a flag indicating that it sent the
- enable-meta sequence
- - _rl_disable_meta_key: new function to turn off meta mode after we
- turned it on with _rl_enable_meta_key
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_disable_meta_key
-
-configure.in
- - if not cross-compiling, set CFLAGS_FOR_BUILD from any CFLAGS inherited
- from the environment. Fixes HP/UX build problem reported by
- "Daniel Richard G." <skunk@iSKUNK.ORG>
-
- 4/26
- ----
-config-top.h
- - define MULTIPLE_COPROCS to 0 so the code is still disabled but easy
- to enable via configure option or editing this file
-
- 4/29
- ----
-lib/sh/eaccess.c
- - freebsd provides faccessat, with the same misfeature as their eaccess
- and access implementations (X_OK returns true for uid==0 regardless
- of the actual file permissions), so reorganize code to check the
- file permissions as with eaccess. Report and fix from Johan Hattne
- <johan.hattne@utsouthwestern.edu>
-
- 5/2
- ---
-doc/{bash.1,bashref.texi}
- - add forward reference to `Pattern Matching' from `Pathname
- Expansion', suggested by Greg Wooledge <wooledg@eeg.ccf.org>
-
- 5/5
- ---
-pcomplib.c
- - the bash_completion project now distributes over 200 completions
- for various programs, with no end in sight, so increase the value
- of COMPLETE_HASH_BUCKETS from 32 to 128
-
-pathexp.c
- - quote_string_for_globbing: make sure CTLESC quoting CTLESC is
- translated into \<CTLESC> even if the flags include QGLOB_REGEXP.
- We don't want to process the second CTLESC as a quote character.
- Fixes bug reported by Shawn Bohrer <sbohrer@rgmadvisors.com>
-
- 5/6
- ---
-builtins/printf.def
- - change PRETURN to not call fflush if ferror(stdout) is true
- - if a call to one of the stdio functions or printstr leaves
- ferror(stdout) true, and PRETURN is going to be called, let PRETURN
- print the error message rather than doubling up the messages. Fixes
- problem reported by Roman Rakus <rrakus@redhat.com>
-
- 5/9
- ---
-doc/{bash.1,bashref.texi}
- - add note to the effect that lists inside compound command can be
- terminated by newlines as well as semicolons. Suggested by
- Roman Byshko <rbyshko@gmail.com>
-
- 5/10
- ----
-subst.c
- - remove_quoted_nulls: fix problem that caused it to skip over the
- character after a CTLNUL, which had the effect of skipping every
- other of a series of CTLNULs. Fixes bug reported by
- Marten Wikstrom <marten.wikstrom@keystream.se>
-
- 5/11
- ----
-subst.c
- - extract_process_subst: add SX_COMMAND flag to call to
- extract_delimited_string, since we're expanding the same sort of
- command as command substitution. Fixes bug reported in Ubuntu
- bug 779848
-
- 5/12
- ----
-configure.in
- - set the prefer_shared and prefer_static variables appropriately
- depending on the value of $opt_static_link
-
-aclocal.m4
- - AC_LIB_LINKFLAGS_BODY: change to not prefer shared versions of the
- libraries it's searching for if the prefer_shared variable is "no".
- Fixes problem reported by Cedric Arbogast <arbogast.cedric@gmail.com>
-
- 5/13
- ----
-lib/readline/readline.c
- - _rl_internal_teardown: add call to _rl_disable_meta_key to make the
- meta key active only for the duration of the call to readline()
- - _rl_internal_setup: move call to _rl_enable_meta_key here from
- readline_initialize_everything so the meta key is active only for
- the duration of the call to readline(). Suggestion from Miroslav
- Lichvar <mlichvar@redhat.com>
-
-builtins/help.def
- - help_builtin: change strncmp to strcmp so that `help read' no longer
- matches `readonly'. Suggested by Clark Wang <dearvoid@gmail.com>
-
-config.h.in
- - add define for GLIBC21, checked using jm_GLIBC21 as part of the tests
- for libintl
-
-lib/malloc/malloc.c
- - internal_free: don't use the cached value of memtop when deciding
- whether or not to adjust the break and give memory back to the kernel
- when using the GNU C library, since glibc uses sbrk for its own
- internal purposes. From Debian bug 614815, reported by Samuel
- Thibault <samuel.thibault@gnu.org>
-
-aclocal.m4
- - BASH_STRUCT_WEXITSTATUS_OFFSET: change AC_RUN_IFELSE to AC_TRY_RUN
- to avoid warning about not using AC_LANG_SOURCE
-
- 5/14
- ----
-bashline.[ch]
- - two new functions, bashline_set_event_hook and bashline_reset_event_hook,
- to set rl_event_hook to bash_event_hook and back to NULL, respectively
- - don't set rl_event_hook unconditionally
-
-sig.c
- - termsig_sighandler: if the shell is currently interactive and
- readline is active, call bashline_set_event_hook to cause
- termsig_handler to be called via bash_event_hook when the shell
- returns from the signal handler
-
- 5/15
- ----
-lib/readline/display.c
- - _rl_col_width: Mac OS X has a bug in wcwidth: it does not return 0
- for UTF-8 combining characters. Added workaround dependent on
- MACOSX. Fixes problem pointed out by Thomas De Contes
- <d.l.tDecontes@free.fr>
-
- 5/16
- ----
-lib/readline/rlmbutil.h
- - WCWIDTH: wrapper for wcwidth that returns 0 for Unicode combining
- characters on systems where wcwidth is broken (e.g., Mac OS X).
-
-lib/readline/{complete,display,mbutil}.c
- - use WCWIDTH instead of wcwidth
-
- 5/17
- ----
-lib/readline/display.c
- - update_line: after computing ofd and nfd, see whether the next
- character in ofd is a zero-width combining character. If it is,
- back ofd and nfd up one, so the base characters no longer compare
- as equivalent. Fixes problem reported by Keith Winstein
- <keithw@mit.edu>
-
-lib/readline/nls.c
- - _rl_utf8locale: new flag variable, set to non-zero if the current
- locale is UTF-8
- - utf8locale(): new function, returns 1 if the passed lspec (or the
- current locale) indicates that the locale is UTF-8. Called from
- _rl_init_eightbit
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_utf8locale
-
-locale.c
- - locale_utf8locale: new flag variable, set to non-zero if the current
- locale is UTF-8 (currently unused)
- - locale_isutf8(): new function, returns 1 if the passed lspec (or the
- current locale) indicates that the locale is UTF-8. Should be called
- whenever the locale or LC_CTYPE value is modified
-
-aclocal.m4
- - BASH_WCWIDTH_BROKEN: new test for whether or not wcwidth returns
- zero-width characters like unicode combining characters as having
- display length 1; define WCWIDTH_BROKEN in this case
-
-config.h.in
- - WCWIDTH_BROKEN: new define
-
-lib/readline/rlmbutil.h
- - change WCWIDTH macro to use _rl_utf8locale and the full range of
- Unicode combining characters (U+0300-U+036F)
-
- 5/19
- ----
-lib/readline/rlprivate.h
- - _rl_search_context: new member, prevc, will hold character read
- prior to lastc
-
-lib/readline/isearch.c
- - _rl_isearch_dispatch: if the character causes us to index into
- another keymap, save that character in cxt->prevc
- - _rl_isearch_dispatch: if we index into another keymap, but don't
- find a function that's special to i-search, and the character that
- caused us to index into that keymap would have terminated the
- search, push back cxt->prevc and cxt->lastc to make it appear as
- if `prevc' terminated the search, and execute lastc as a command.
- We have to push prevc back so we index into the same keymap before
- we read lastc. Fixes bug report from Davor Cubranic
- <cubranic@stat.ubc.ca>
-
- 5/20
- ----
-expr.c
- - expr_bind_variable: pay attention to the return value from
- bind_variable and check whether or not we should error out due to
- a readonly or noassign variable. Fixes bug reported by Eric
- Blake <eblake@redhat.com>
-
- 5/26
- ----
-
-lib/readline/search.c
- - include histlib.h for ANCHORED_SEARCH defines
- - rl_history_search_flags: new variable, holds ANCHORED_SEARCH flag for
- the duration of a history search
- - rl_history_search_reinit: takes a new flags variable, defines whether
- or not the search is anchored; assigned to rl_history_search_flags
- - rl_history_serarch_reinit: if ANCHORED_SEARCH flag passed, add ^ to
- beginning of search string; otherwise search string is unmodified
- - rl_history_search_internal: set rl_point appropriately based on
- whether or not rl_history_search_flags includes ANCHORED_SEARCH
- - rl_history_substr_search_forward: new function, for non-anchored
- substring search forward through history for string of characters
- preceding rl_point
- - rl_history_substr_search_backward: new function, for non-anchored
- substring search backward through history for string of characters
- preceding rl_point. Original code from Niraj Kulkarni
- <kulkarniniraj14@gmail.com>
-
-lib/readline/readline.h
- - extern declarations for rl_history_substr_search_{for,back}ward
-
-lib/readline/funmap.c
- - history-substring-search-forward: new bindable command, invokes
- rl_history_substr_search_forward
- - history-substring-search-backward: new bindable command, invokes
- rl_history_substr_search_backward
-
-lib/readline/doc/{rluser.texi,readline.3}
- - document history-substring-search-forward and
- history-substring-search-backward
-
- 5/27
- ----
-{nojobs,jobs}.c
- - add support for DONT_REPORT_SIGTERM so that the shell doesn't print
- a message when a job exits due to SIGTERM since that's the default
- signal sent by the kill builtin. Suggested by Marc Herbert
- <mark.herbert@gmail.com>
-
-config-top.h
- - DONT_REPORT_SIGTERM: new user-modifiable setting. Commented out
- by default
-
- 5/28
- ----
-lib/readline/bind.c
- - _rl_skip_to_delim: skip to a closing double quote or other delimiter,
- allowing backslash to quote any character, including the delimiter
- - rl_parse_and_bind: call _rl_skip_to_delim instead of using inline
- code
- - rl_parse_and_bind: allow quoted strings as the values of string
- variables. Variable values without double quotes have trailing
- whitespace removed (which still allows embedded whitespace, for
- better or worse). Fixes problem with string variables not matching
- in `set' command if values happen to have trailing spaces or tabs
- (debian bash bug #602762), but introduces slight incompatibility.
-
- 5/29
- ----
-doc/{bash.1,bashref.texi}
- - clarify unset description to specify that without options, a
- variable, then a shell function if there is no variable by that
- name, is unset. Fixes discrepancy reported by Mu Qiao
- <qiaomuf@gentoo.org>
-
- 6/4
- ----
-doc/{bash.1,bashref.texi}
- - clarify description of LINES and COLUMNS (and checkwinsize shopt
- option) to make it clear that only interactive shells set a
- handler for SIGWINCH and update LINES and COLUMNS. Original
- report submitted by Jonathan Nieder <jrnieder@gmail.com>
-
-arrayfunc.c
- - expand_compound_array_assignment: defer expansion of words between
- parens when performing compound assignmnt to an associative array
- variable
- - assign_compound_array_list: perform the same expansions when doing
- a compound array assignment to an associative array variable as
- when doing a straight array index assignment. The idea is that
- foo=( [ind1]=bar [ind2]=quux)
- is the same as
- foo[ind1]=bar ; foo[ind2]=quux
-
- This fixes problems with double-expansion and quote removal being
- performed on the array indices
-
- 6/13
- ----
-doc/{bash.1,bashref.texi}
- - Add a little text to make it clear that the locale determines how
- range expressions in glob patterns are handled.
-
-
- 6/21
- ----
-builtins/read.def
- - display a message and return error status if -a is used with an
- existing associative array. Fixes bug reported by Curtis Doty
- <curtis@greenkey.net>
-
- 6/24
- ----
-{jobs,nojobs}.c
- - non-interactive shells now react to the setting of checkwinsize
- and set LINES and COLUMNS after a foreground job exits. From a
- suggestion by Leslie Rhorer <lrhorer@satx.rr.com>
-
-doc/{bash.1,bashref.texi}
- - checkwinsize: remove language saying that only interactive shells
- check the window size after each command
-
-lib/readline/histfile.c
- - history_backupfile: new file, creates a backup history file name
- given a filename (appending `-')
- - history_do_write: when overwriting the history file, back it up
- before writing. Restore backup file on a write error. Suggested
- by chkno@chkno.net
-
-bashline.c
- - find_cmd_name: two new arguments, return the start and end of the
- actual text string used to find the command name, without taking
- whitespace into account
- - attempt_shell_completion: small changes to make sure that completion
- attempted at the beginning of a non-empty line does not find a
- programmable completion, even if the command name starts at point
- - attempt_shell_completion: small change to make sure that completion
- does not find a progcomp when in whitespace before the command
- name
- - attempt_shell_completion: small change to make sure that completion
- does not find a progcomp when point is at the first character of a
- command name, even when there is leading whitespace (similar to
- above). Fixes problems noted by Ville Skytta <ville.skytta@iki.fi>
-
-subst.c
- - brace_expand_word_list: since the individual strings in the strvec
- returned by brace_expand are already allocated, don't copy them to
- newly-allocated memory when building the WORD_LIST, just use them
- intact
-
-locale.c
- - locale_mb_cur_max: cache value of MB_CUR_MAX when we set or change
- the locale to avoid a function call every time we need to read it
-
-shell.h
- - new struct to save shell_input_line and associated variables:
- shell_input_line_state_t
- - add members of sh_parser_state_t to save and restore token and the
- size of the token buffer
-
-parse.y
- - {save,restore}_input_line_state: new functions to save and restore
- shell_input_line and associated variables
- - {save,restore}_parser_state: add code to save and restore the token
- and token buffer size
- - xparse_dolparen: call save_ and restore_input_line_state to avoid
- problems with overwriting shell_input_line when we recursively
- call the parser to parse a command substitution. Fixes bug
- reported by Rui Santos <rsantos@grupopie.com>
-
-include/shmbutil.h
- - use locale_mb_cur_max instead of MB_CUR_MAX in ADVANCE_CHAR and
- similar macros
-
-lib/glob/smatch.c
- - rangecmp,rangecmp_wc: change to take an additional argument, which
- forces the use of strcoll/wscoll when non-zero. If it's 0, a new
- variable `glob_asciirange' controls whether or not we use strcoll/
- wscoll. If glob_asciirange is non-zero, we use straight
- C-locale-like ordering. Suggested by Aharon Robbins
- <arnold@skeeve.com>
-
- 6/30
- ----
-execute_cmd.c
- - execute_pipeline: make sure the lastpipe code is protected by
- #ifdef JOB_CONTROL. Fixes problem reported by Thomas Cort
- <tcort@minix3.org>
-
- 7/2
- ---
-lib/readline/complete.c
- - EXPERIMENTAL: remove setting of _rl_interrupt_immediately around
- completion functions that touch the file system. Idea from Jan
- Kratochvil <jan.ktratochvil@redhat.com> and the GDB development
- team
-
-lib/readline/signals.c
- - rl_signal_handler: if we're in callback mode, don't interrupt
- immediately on a SIGWINCH
-
- 7/3
- ---
-bashline.c
- - set_directory_hook: and its siblings are a new set of functions to
- set, save, and restore the appropriate directory completion hook
- - change callers to use {set,save,restore}_directory_hook instead of
- manipulating rl_directory_rewrite_hook directly
- - dircomplete_expand: new variable, defaults to 0, if non-zero causes
- directory names to be word-expanded during word and filename
- completion
- - change {set,save,restore}_directory_hook to look at dircomplete_expand
- and change rl_directory_completion_hook or rl_directory_rewrite_hook
- appropriately
-
-bashline.h
- - extern declaration for set_directory_hook so shopt code can use it
-
- 7/6
- ---
-builtins/shopt.def
- - globasciiranges: new settable shopt option, makes glob ranges act
- as if in the C locale (so b no longer comes between A and B).
- Suggested by Aharon Robbins <arnold@skeeve.com>
-
- 7/7
- ---
-doc/{bash.1,bashref.texi}
- - document new `globasciiranges' shopt option
-
- 7/8
- ---
-builtins/shopt.def
- - direxpand: new settable option, makes filename completion expand
- variables in directory names like bash-4.1 did.
- - shopt_set_complete_direxpand: new function, does the work for the
- above by calling set_directory_hook
-
-doc/{bash.1,bashref.texi}
- - document new `direxpand' shopt option
-
- 7/15
- ----
-lib/readline/isearch.c
- - _rl_isearch_dispatch: when adding character to search string, use
- cxt->lastc (which we use in the switch statement) instead of c,
- since lastc can be modified earlier in the function
-
- 7/18
- ----
-lib/readline/rlprivate.h
- - _rl_search_context: add another member to save previous value of
- (multibyte) lastc: pmb is to mb as prevc is to lastc
-
-lib/readline/isearch.c:
- - _rl_isearch_dispatch: if a key sequence indexes into a new keymap,
- but doesn't find any bound function (k[ind].function == 0) or is
- bound to self-insert (k[ind].function == rl_insert), back up and
- insert the previous character (the one that caused the index into a
- new keymap) and arrange things so the current character is the next
- one read, so both of them end up in the search string. Fixes bug
- reported by Clark Wang <dearvoid@gmail.com>
- - _rl_isearch_dispatch: a couple of efficiency improvements when adding
- characters to the isearch string
-
- 7/24
- ----
-lib/readline/isearch.c
- - _rl_isearch_dispatch: save and restore cxt->mb and cxt->pmb
- appropriately when in a multibyte locale
-
-doc/{bash.1,bashref.texi}
- - correct description of {x}>file (and other redirection operators
- that allocate a file descriptor) to note the the fd range is
- greater than or equal to 10. Fixes problem reported by
- Christian Ullrich
-
-lib/readline/signals.c
- - rl_signal_handler: don't interrupt immediately if in callback mode
-
-lib/readline/callback.c
- - rl_callback_read_char: install signal handlers only when readline
- has control in callback mode, so readline's signal handlers aren't
- called when the application is active (e.g., between the calls to
- rl_callback_handler_install and rl_callback_read_char). If the
- readline signal handlers only set a flag, which the application
- doesn't know about, the signals will effectively be ignored until
- the next time the application calls into the readline callback
- interface. Fixes problem of calling unsafe functions from signal
- handlers when in callback mode reported by Jan Kratochvil
- <jan.kratochvil@redhat.com>
-
-execute_cmd.c
- - fix_assignment_words: when in Posix mode, the `command' builtin
- doesn't change whether or not the command name it protects is an
- assignment builtin. One or more instances of `command'
- preceding `export', for instance, doesn't make `export' treat its
- assignment statement arguments differently. Posix interpretation
- #351
-
-doc/{bash.1,bashref.texi}
- - document new Posix-mode behavior of `command' when preceding builtins
- that take assignment statements as arguments
-
-builtins/printf.def
- - printstr: if fieldwidth or precision are < 0 or > INT_MAX when
- supplied explicitly (since we take care of the `-' separately),
- clamp at INT_MAX like when using getint(). Fixes issue reported
- by Ralph Coredroy <ralph@inputplus.co.uk>
-
- 7/25
- ----
-lib/readline/chardefs.h
- - isxdigit: don't define if compiling with c++; declared as a c++
- template function. Fixes bug reported by Miroslav Lichvar
- <mlichvar@redhat.com>
-
-builtins/printf.def
- - getint: if garglist == 0, return whatever getintmax returns (0).
- Fixes bug reported by Ralph Coredroy <ralph@inputplus.co.uk>
-
- 7/28
- ----
-doc/{bash.1,bashref.texi}
- - minor changes to the descriptions of the cd and pushd builtins
-
-lib/sh/zread.c
- - zsyncfd: change variable holding return value from lseek to
- off_t. Bug report and fix from Gregory Margo <gmargo@pacbell.net>
-
- 8/1
- ---
-expr.c
- - don't check for division by 0 when in a context where no evaluation
- is taking place. Fixes bug reported by dnade.ext@orange-ftgroup.com
-
- 8/6
- ---
-execute_cmd.c
- - execute_command_internal: the parent branch of the subshell code
- (where the child calls execute_in_subshell) should not close all
- open FIFOs with unlink_fifo_list if it's part of a shell function
- that's still executing. Fixes bug reported by Maarten Billemont
- <lhunath@lyndir.com>
-
- 8/9
- ---
-builtins/common.c
- - get_exitstat: return EX_BADUSAGE (2) on a non-numeric argument
-
-builtins/return.def
- - return_builtin: just call get_exitstat to get the return status,
- let it handle proper parsing and handling of arguments. Fixes
- issue most recently raised by Linda Walsh <bash@tlinx.org>.
- Reverses change from 9/11/2008 (see above)
-
- 8/16
- ----
-doc/{bash.1,bashref.texi}
- - clean up `set -e' language to make it clearer that any failure of
- a compound command will cause the shell to exit, not just subshells
- and brace commands
-
- 8/17
- ----
-configure.in
- - make the various XXX_FOR_BUILD variables `precious' to autoconf to
- avoid stale data
- - change how CC_FOR_BUILD is initialized when cross-compiling and not,
- but do not change behavior
- - initialize CFLAGS_FOR_BUILD to -g when cross-compiling
- - initialize LIBS_FOR_BUILD to $(LIBS) when not cross-compiling, empty
- when cross-compiling
- - create AUTO_CFLAGS variable to hold basic CFLAGS defaults; used when
- CFLAGS not inherited from environment (like effect of old
- auto_cflags variable)
- - substitute LIBS_FOR_BUILD into output Makefiles
- [changes inspired by bug report from Nathan Phillip Brink
- <ohnobinki@ohnopublishing.net> -- gentoo bug 378941]
-
-builtins/Makefile.in
- - substitute LIBS_FOR_BUILD from configure, not strictly initialized
- to $(LIBS)
-
- 8/27
- ----
-doc/{bash.1,bashref.texi}
- - minor changes to the here string description to clarify the
- expansions performed on the word
-
-support/shobj-conf
- - handle compilation on Lion (Mac OS X 10.7/darwin11) with changes
- to darwin stanzas. Fixes readline bug reported by Vincent
- Sheffer <vince.sheffer@apisphere.com>
-
-lib/sh/strtrans.c
- - ansic_wshouldquote: check a string with multi-byte characters for
- characters that needs to be backslash-octal escaped for $'...'
- - ansic_shouldquote: if is_basic fails for one character, let
- ansic_wshouldquote examine the rest of the string and return what
- it returns. From a patch sent by Roman Rakus <rrakus@redhat.com>
-
- 8/30
- ----
-lib/sh/strtrans.c
- - ansic_quote: changes to quote (or not) multibyte characters. New
- code converts them to wide characters and uses iswprint to check
- valid wide chars. From a patch sent by Roman Rakus
- <rrakus@redhat.com>
-
- 9/7
- ---
-lib/sh/shquote.c
- - sh_backslash_quote: change to be table-driven so we can use a
- different table if we want to
- - sh_backslash_quote: takes a second char table[256] argument;
-
-externs.h
- - sh_backslash_quote: add second argument to function prototype
-
-bashline.c,braces.c,parse.y,builtins/printf.def
- - change callers of sh_backslash_quote to add second argument
-
-bashline.c
- - filename_bstab: table of characters to pass to sh_backslash_quote;
- characters with value 1 will be backslash-quoted
- - set_filename_bstab: turn on characters in filename backslash-quote
- table according to passed string argument
- - call set_filename_bstab every time rl_filename_quote_characters is
- assigned a value
- - bash_quote_filename: call sh_backslash_quote with filename_bstab
- as second argument. This allows other characters in filenames to
- be quoted without quoting, for instance, a dollar sign in a shell
- variable reference
-
- 9/8
- ---
-bashline.c
- - complete_fullquote: new variable, controls table passed to
- sh_backslash_quote. If non-zero (the default), the standard set
- of shell metacharacters -- as in bash versions up to and including
- bash-4.2 -- gets backslash-quoted by the completion code. If zero,
- sh_backslash_quote gets the table with the characters in the
- variable reference removed, which means they are removed from the
- set of characters to be quoted in filenames
-
- 9/10
- ----
-bashline.c
- - bash_filename_stat_hook: new function, designed to expand variable
- references in filenames before readline passes them to stat(2)
- to determine whether or not they are a directory
-
- 9/15
- ----
-builtins/declare.def
- - if assign_array_element fails due to a bad (or empty) subscript, mark
- it as an assignment error and don't attempt any further processing
- of that declaration. Fixes segfault bug reported by Diego Augusto
- Molina <diegoaugustomolina@gmail.com>
-
- 9/19
- ----
-expr.c
- - exppower: replace the simple exponentiation algorithm with an
- implementation of exponentiation by squaring. Inspired by report
- from Nicolas ARGYROU <nargy@yahoo.com>
-
-bashline.c
- - bash_quote_filename: check for rtext being non-null before
- dereferencing it
- - set_saved_history: operate_and_get_next assumes that the previous
- line was added to the history, even when the history is stifled and
- at the max number of entries. If it wasn't, make sure the history
- number is incremented properly. Partial fix for bug reported by
- gregrwm <backuppc-users@whitleymott.net>
-
-doc/{bash.1,bashref.texi},lib/readline/doc/{hsuser,rluser}.texi
- - minor editorial changes inspired by suggestions from
- Roger Zauner <rogerx.oss@gmail.com>
-
- 9/20
- ----
-lib/intl/localealias.c
- - read_alias_file: close resource leak (fp) when returning on error
-
- 9/22
- ----
-execute_command.c
- - execute_intern_function: implement Posix interpretation 383 by making
- it an error to define a function with the same name as a special
- builtin when in Posix mode.
- http://austingroupbugs.net/view.php?id=383#c692
-
- 9/25
- ----
-doc/{bash.1,bashref.texi}
- - formatting and some content changes from Benno Schulenberg
- <bensberg@justemail.net>
- - document new posix-mode behavior from interp 383 change of 9/22
-
- 9/30
- ----
-execute_cmd.c
- - shell_execve: add strerror to error message about executable file
- that shell can't execute as a shell script. From suggestion by
- daysleeper <daysleeper@centrum.cz>
-
- 10/1
- ----
-bashhist.c
- - maybe_add_history: act as if literal_history is set when parser_state
- includes PST_HEREDOC, so we save the bodies of here-documents just
- as they were entered. Fixes bug reported by Jonathan Wakely
- <bugs@kayari.org>
- - bash_add_history: make sure that the second and subsequent lines of
- a here document don't have extra newlines or other delimiting
- chars added, since they have the trailing newline preserved, when
- `lithist' is set and history_delimiting_chars isn't called
-
-execute_cmd.c
- - execute_command_internal: avoid fd exhaustion caused by using
- process substitution in loops inside shell functions by using
- copy_fifo_list and close_new_fifos (). Fixes debian bash bug
- 642504
-
-lib/readline/complete.c
- - new variable, rl_filename_stat_hook, used by append_to_match. If
- filename completion is desired, and rl_filename_stat_hook points
- to a function, call that function to expand the filename in an
- application-specific way before calling stat.
-
-bashline.c
- - bash_default_completion: if variable completion returns a single
- match, use bash_filename_stat_hook and file_isdir to determine
- whether or not the variable name expands to a directory. If it
- does, set the filename_append_character to `/'. This is not
- perfect, so we will see how it works out. Adds functionality
- requested by Peter Toft <pto@linuxbog.dk> and Patrick Pfeifer
- <patrick@pfeifer.de>
- - rl_filename_stat_hook: assigned bash_filename_stat_hook, so things
- like $HOME/Downloads (after completion) have a slash appended.
- In general, this causes the stat hook to be called whenever
- filename completion is appended. Adds functionality requested by
- Patrick Pfeifer <patrick@pfeifer.de>
-
-lib/readline/readline.h
- - new extern declaration for rl_filename_stat_hook
-
-lib/readline/doc/rltech.texi
- - rl_directory_rewrite_hook: now documented
- - rl_filename_stat_hook: document
-
-pcomplete.c
- - gen_action_completions: in the CA_DIRECTORY case, turn off
- rl_filename_completion_desired if it was off before we called
- rl_filename_completion_function and we didn't get any matches.
- Having it on causes readline to quote the matches as if they
- were filenames. Adds functionality requested by many,
- including Clark Wang <dearvoid@gmail.com>
-
-assoc.[ch]
- - assoc_replace: new function, takes the same arguments as
- assoc_insert, but returns the old data instead of freeing it
- - assoc_insert: if the object returned by hash_insert doesn't have
- the same value for its key as the key passed as an argument, we
- are overwriting an existing value. In this case, we can free the
- key. Fixes bug reported by David Parks <davidparks21@yahoo.com>
-
- 10/5
- ----
-print_cmd.c
- - indirection_level_string: small change to only re-enable `x'
- option after calling decode_prompt_string if it was on before. In
- normal mode, it will be, but John Reiser <jreiser@bitwagon.com>
- has a novel use for that code in conjunction with a pre-loaded
- shared library that traces system call usage in shell scripts
-
- 10/10
- -----
-Makefile.in
- - Fix from Mike Frysinger <vapier@gentoo.org> to avoid trying to
- build y.tab.c and y.tab.h with two separate runs of yacc if
- parse.y changes. Problem with parallel makes
- - Fix from Mike Frysinger <vapier@gentoo.org> to avoid subdirectory
- builds each trying to make version.h (and all its dependencies)
-
-lib/sh/Makefile.in
- - remove some dependencies on version.h where it doesn't make sense
-
-variables.c
- - initialize_shell_variables: while reading the environment, a shell
- running in posix mode now checks for SHELLOPTS being readonly (it
- gets set early on in main()) before trying to assign to it. It
- saves an error message and the variable gets parsed as it should.
- Fixes bug reported by Len Giambrone <Len.Giambrone@intersystems.com>
-
- 10/14
- -----
-doc/{bash.1,bashref.texi}
- - add to the "duplicating file descriptors" description that >&word
- doesn't redirect stdout and stderr if word expands to `-'
- - add to the "appending standard output and standard error"
- description a note that >&word, where word is a number or `-',
- causes other redirection operators to apply for sh and Posix
- compatibility reasons. Suggested by Greg Wooledge
- <wooledg@eeg.ccf.org>
-
- 10/15
- -----
-pcomplete.c
- - change pcomp_filename_completion_function to only run the filename
- dequoting function in the cases (as best as it can figure) where
- readline won't do it via rl_filename_completion_function. Based
- on reports from <lolilolicon@gmail.com>
-
- 10/19
- -----
-bashline.c
- - attempt_shell_completion: add call to set_directory_hook() to make
- sure the rewrite functions are correct. It's cheap and doesn't
- hurt
- - command_word_completion_function: if completing a command name that
- starts with `.' or `..', temporarily suppress the effects of the
- `direxpand' option and restore the correct value after calling
- rl_filename_completion_function. If it's enabled, the directory
- name will be rewritten and no longer match `./' or `../'. Fixes
- problem reported by Michael Kalisz <michael@kalisz.homelinux.net>
-
- 10/22
- -----
-builtins/history.def
- - push_history: make sure remember_on_history is enabled before we
- try to delete the last history entry -- the `history -s' command
- might not have been saved. Fixes bug reported by
- lester@vmw-les.eng.vmware.com
-
-lib/readline/complete.c
- - rl_callback_read_char: add calls to a macro CALLBACK_READ_RETURN
- instead of straight return; add same call at end of function.
- Placeholder for future work in deinstalling signal handlers when
- readline is not active
-
- 10/25
- -----
-expr.c
- - exp2: catch arithmetic overflow when val1 == INTMAX_MIN and val2 == -1
- for DIV and MOD and avoid SIGFPE. Bug report and pointer to fix
- from Jaak Ristioja <jaak.ristioja@cyber.ee>
- - expassign: same changes for arithmetic overflow for DIV and MOD
-
- 10/28
- -----
-subst.c
- - parameter_brace_expand: allow pattern substitution when there is an
- expansion of the form ${var/} as a no-op: replacing nothing with
- nothing
- - parameter_brace_patsub: don't need to check for PATSUB being NULL;
- it never is
-
-flags.c
- - if STRICT_POSIX is defined, initialize history_expansion to 0, since
- history expansion (and its treatment of ! within double quotes) is
- not a conforming posix environment. From austin-group issue 500
-
-lib/readline/histexpand.c
- - history_expand: when processing a string within double quotes
- (DQUOTE == 1), make the closing double quote inhibit history
- expansion, as if the word were outside double quotes. In effect,
- we assume that the double quote is followed by a character in
- history_no_expand_chars. tcsh and csh seem to do this. This
- answers a persistent complaint about history expansion
-
- 10/29
- -----
-make_cmd.c
- - make_arith_for_command: use skip_to_delim to find the next `;'
- when breaking the string between the double parens into three
- separate components instead of a simple character loop. Fixes
- bug reported by Dan Douglas <ormaaj@gmail.com>
-
- 11/2
- ----
-Makefile.in
- - make libbuiltins.a depend on builtext.h to serialize its creation
- and avoid conflict between multiple invocations of mkbuiltins.
- Fix from Mike Frysinger <vapier@gentoo.org>
-
- 11/5
- ----
-findcmd.c
- - user_command_matches: if stat(".", ...) returns -1, set st_dev
- and st_ino fields in dotinfo to 0 to avoid same_file matches
- - find_user_command_in_path: check stat(2) return the same way
-
-lib/glob/glob.c
- - glob_vector: don't call strlen(pat) without checking pat == 0
- - glob_dir_to_array: make sure to free `result' and all allocated
- members before returning error due to malloc failure
- - glob_vector: make sure to free `nextname' and `npat' on errors
- (mostly when setting lose = 1)
- - glob_vector: if flags & GX_MATCHDIRS but not GX_ALLDIRS, make
- sure we free `subdir'
- - glob_filename: when expanding ** (GX_ALLDIRS), make sure we
- free temp_results (return value from glob_vector)
-
-lib/glob/xmbsrtowcs.c
- - xdupmbstowcs: fix call to realloc to use sizeof (char *) instead
- of sizeof (char **) when assigning idxtmp
-
-execute_cmd.c
- - print_index_and_element: return 0 right away if L == 0
- - is_dirname: fix memory leak by freeing `temp'
- - time_command: don't try to deref NULL `command' when assigning
- to `posix_time'
- - shell_execve: null-terminate `sample' after READ_SAMPLE_BUF so it's
- terminated for functions that expect that
-
-builtins/read.def
- - read_builtin: don't call bind_read_variable with a potentially-null
- string
-
-pcomplete.c
- - gen_command_matches: don't call dispose_word_desc with a NULL arg
- - gen_compspec_completions: fix memory leak by freeing `ret' before
- calling gen_action_completions (tcs, ...). happens when
- performing directory completion as default and no completions
- have been generated
- - gen_progcomp_completions: make sure to set foundp to 0 whenever
- returning NULL
- - it_init_aliases: fix memory leak by freeing alias_list before
- returning
-
-bashline.c
- - command_word_completion_function: don't call restore_tilde with a
- NULL directory_part argument
- - bash_directory_expansion: bugfix: don't throw away results of
- rl_directory_rewrite_hook if it's set and returns non-zero
- - bind_keyseq_to_unix_command: free `kseq' before returning error
-
-arrayfunc.c
- - assign_array_element_internal: make sure `akey' is freed if non-null
- before returning error
- - assign_compound_array_list: free `akey' before returning error
- - array_value_internal: free `akey' before returning error
- - unbind_array_element: free `akey' before returning error
-
-subst.c
- - array_length_reference: free `akey' before returning error in case
- of expand_assignment_string_to_string error
- - array_length_reference: free `akey' after call to assoc_reference
- - skip_to_delim: if skipping process and command substitution, free
- return value from extract_process_subst
- - parameter_brace_substring: free `val' (vtype == VT_VARIABLE) before
- returning if verify_substring_values fails
- - parameter_brace_expand: remove two duplicate lines that allocate
- ret in parameter_brace_substring case
- - parameter_brace_expand: convert `free (name); name = xmalloc (...)'
- to use `xrealloc (name, ...)'
- - parameter_brace_expand: free `name' before returning when handling
- ${!PREFIX*} expansion
- - split_at_delims: fix memory leak by freeing `d2' before returning
-
-redir.c
- - redirection_error: free `filename' if the redirection operator is
- REDIR_VARASSIGN by assigning allocname
-
-eval.c
- - send_pwd_to_eterm: fix memory leak by freeing value returned by
- get_working_directory()
-
-builtins/cd.def
- - change_to_directory: fix memory leak by freeing return value from
- resetpwd()
- - cd_builtin: fix memory leak by freeing value returned by dirspell()
- - cd_builtin: fix memory leak by freeing `directory' if appropriate
- before overwriting with return value from resetpwd()
-
-builtins/type.def
- - describe_command: free `full_path' before overwriting it with return
- value from sh_makepath
-
-builtins/complete.def
- - compgen_builtin: fix memory leak by calling strlist_dispose (sl)
- before overwriting sl with return value from completions_to_stringlist
-
-builtins/hash.def
- - list_hashed_filename_targets: fix memory leak by freeing `target'
-
-make_cmd.c
- - make_arith_for_command: free `init', `test', and `step' before
- returning error on parse error
-
-jobs.c
- - initialize_job_control: don't call move_to_high_fd if shell_tty == -1
-
-general.c
- - check_dev_tty: don't call close with an fd < 0
- - legal_number: deal with NULL `string' argument, return invalid
-
-lib/sh/fmtulong.c
- - fmtulong: if the `base' argument is invalid, make sure we index
- buf by `len-1' at maximum
-
-print_cmd.c
- - print_deferred_heredocs: don't try to dereference a NULL `cstring'
- - cprintf: make sure to call va_end (args)
-
-variables.c
- - push_dollar_vars: fix call to xrealloc to use sizeof (WORD_LIST *)
- instead of sizeof (WORD_LIST **)
-
-lib/sh/zmapfd.c
- - zmapfd: if read returns error, free result and return -1 immediately
- instead of trying to reallocate it
-
- 11/6
- ----
-execute_cmd.c
- - cpl_reap: rewrote to avoid using pointer after freeing it; now builds
- new coproc list on the fly while traversing the old one and sets the
- right values for coproc_list when done
-
- 11/12
- -----
-builtins/set.def
- - if neither -f nor -v supplied, don't allow a readonly function to
- be implicitly unset. Fixes bug reported by Jens Schmidt
- <jens.schmidt35@arcor.de>
-
-lib/readline/callback.c
- - change CALLBACK_READ_RETURN to clear signal handlers before returning
- from rl_callback_read_char so readline's signal handlers aren't
- installed when readline doesn't have control. Idea from Jan
- Kratochvil <jan.ktratochvil@redhat.com> and the GDB development
- team
-
-pcomplete.h
- - COPT_NOQUOTE: new complete/compgen option value
-
-builtins/complete.def
- - noquote: new complete/compgen option; will be used to disable
- filename completion quoting
-
-pcomplete.c
- - pcomp_set_readline_variables: pay attention to COPT_NOQUOTE; turns
- of rl_filename_quoting_desired if set; turns it on if unset (value
- is inverted, since default is on)
-
-doc/bash.1,lib/readline/doc/rluser.texi
- - document new -o noquote option to complete/compgen/compopt
-
-pathexp.c
- - quote_string_for_globbing: if QGLOB_REGEXP, make sure characters
- between brackets in an ERE bracket expression are not inappropriately
- quoted with backslashes. This is a pretty substantial change,
- should be stressed when opening bash up for alpha and beta tests.
- Fixes bug pointed out by Stephane Chazleas
- <stephane_chazelas@yahoo.fr>
-
-doc/{bash.1,bashref.texi}
- - document that regexp matches can be inconsistent when quoting
- characters in bracket expressions, since usual quoting characters
- lose their meaning within brackets
- - note that regular expression matching when the pattern is stored
- in a shell variable which is quoted for expansion causes string
- matching
-
-redir.h
- - RX_SAVEFD: new flag value; notes that a redirection denotes an
- fd used to save another even if it's not >= SHELL_FD_BASE
-
-redir.c
- - do_redirection_internal: when deciding whether or not to reset the
- close-on-exec flag on a restored file descriptor, trust the value
- of redirect->flags & RX_SAVCLEXEC even if the fd is < SHELL_FD_BASE
- if the RX_SAVEFD flag is set
- - add_undo_redirect: set the RX_SAVEFD flag if the file descriptor
- limit is such that the shell can't duplicate to a file descriptor
- >= 10. Fixes a limitation that tripped a coreutils test reported
- by Paul Eggert <eggert@cs.ucla.edu>
-
- 11/19
- -----
-doc/{bash.1,bashref.texi},lib/readline/doc/hsuser.texi
- - make it clear that bash runs HISTFILESIZE=$HISTSIZE after reading
- the startup files
- - make it clear that bash runs HISTSIZE=500 after reading the
- startup files
- - make it clear that setting HISTSIZE=0 causes commands to not be
- saved in the history list
- - make it clear that setting HISTFILESIZE=0 causes the history file
- to be truncated to zero size
-
-variables.c
- - sv_histsize: change so setting HISTSIZE to a value less than 0
- causes the history to be `unstifled'
- - sv_histsize: change so setting HISTFILESIZE to a value less than 0
- results in no file truncation
- - make it clear that numeric values less than 0 for HISTFILESIZE or
- HISTSIZE inhibit the usual functions
-
- 11/23
- -----
-parse.y
- - save_input_line_state: add missing `return ls' at the end, since the
- function is supposed to return its argument. Pointed out by
- Andreas Schwab <schwab@linux-m68k.org>
-
-builtins/read.def
- - skip over NUL bytes in input, as most modern shells seem to. Bug
- report by Matthew Story <matt@tablethotels.com>
-
-lib/readline/vi_mode.c
- - rl_vi_replace: set _rl_vi_last_key_before_insert to invoking key
-
- 11/25
- -----
-builtins/read.def
- - read_builtin: if xrealloc returns same pointer as first argument,
- don't bother with the remove_unwind_protect/add_unwind_protect pair
- - read_builtin: set a flag (`reading') around calls to zread/zreadc
- and readline()
- - sigalrm: change to set flag (`sigalrm_seen') and only longjmp if
- currently in read(2) (reading != 0)
- - CHECK_ALRM: new macro, checks sigalrm_seen and longjmps if non-zero,
- behavior of old SIGALRM catching function
- - read_builtin: call CHECK_ALRM in appropriate places while reading
- line of input. Fixes bug reported by Pierre Gaston
- <pierre.gaston@gmail.com>
-
-lib/readline/vi_mode.c
- - rl_vi_replace: initialize characters before printing characters in
- vi_replace_keymap to their default values in vi_insertion_keymap,
- since we're supposed to be in insert mode replacing characters
- - rl_vi_replace: call rl_vi_start_inserting to set last command to
- `R' for undo
- - rl_vi_replace: set _rl_vi_last_key_before_insert to `R' for future
- use by _rl_vi_done_inserting
- - vi_save_insert_buffer: new function, broke out code that copies text
- into vi_insert_buffer from _rl_vi_save_insert
- - _rl_vi_save_replace: new function, saves text modified by
- rl_vi_replace (using current point and vi_replace_count to figure
- it out) to vi_replace_buffer
- - _rl_vi_save_insert: call vi_save_insert_buffer
- - _rl_vi_done_inserting: if _rl_vi_last_key_before_insert == 'R', call
- _rl_vi_save_replace to save text modified in replace mode (uses
- vi_save_insert_buffer)
- - _rl_vi_replace_insert: new function, replaces the number of chars
- in vi_insert_buffer after rl_point with contents ov vi_insert_buffer
- - rl_vi_redo: call _rl_vi_replace_insert if last command == 'R' and
- there's something in vi_insert_buffer. Fixes bug with `.' not
- redoing the most recent `R' command, reported by Geoff Clare
- <g.clare@opengroup.org> in readline area on savannah
-
- 11/26
- -----
-lib/readline/rlprivate.h
- - RL_SIG_RECEIVED(): evaluate to non-zero if there is a pending signal
- to be handled
- - RL_SIGINT_RECEIVED(): evaluate to non-zero if there is a pending
- SIGINT to be handled
-
-lib/readline/complete.c
- - remove all mention of _rl_interrupt_immediately
- - rl_completion_matches: check RL_SIG_RECEIVED after each call to
- the entry function, call RL_CHECK_SIGNALS if true to handle the
- signal
- - rl_completion_matches: if RL_SIG_RECEIVED evaluates to true, free
- and zero out the match_list this function allocated
- - rl_completion_matches: if the completion entry function is
- rl_filename_completion_function, free the contents of match_list,
- because that function does not keep state and will not free the
- entries; avoids possible memory leak pointed out by
- Garrett Cooper <yanegomi@gmail.com>
- - gen_completion_matches: if RL_SIG_RECEIVED evalutes to true after
- calling rl_attempted_completion_function, free the returned match
- list and handle the signal with RL_CHECK_SIGNALS; avoids
- possible memory leak pointed out by Garrett Cooper
- <yanegomi@gmail.com>
- - gen_completion_matches: if RL_SIG_RECEIVED evaluates to true after
- calling rl_completion_matches, free the returned match list and
- handle the signal with RL_CHECK_SIGNALS
-
-lib/readline/util.c
- - rl_settracefp: new utility function to set the tracing FILE *
-
-lib/readline/signals.c
- - _rl_sigcleanup: pointer to a function that will be called with the
- signal and a void * argument from _rl_handle_signal
- - _rl_sigcleanarg: void * that the rest of the code can set to have
- passed to the signal cleanup function
- - _rl_handle_signal: if _rl_sigcleanup set, call as
- (*_rl_sigcleanup) (sig, _rl_sigcleanarg)
-
-lib/readline/rlprivate.h
- - extern declarations for _rl_sigcleanup and _rl_sigcleanarg
-
-lib/readline/complete.c
- - _rl_complete_sigcleanup: signal cleanup function for completion code;
- calls _rl_free_match_list on _rl_sigcleanarg if signal == SIGINT
- - rl_complete_internal: before calling display_matches if what_to_do
- == `?', set _rl_sigcleanup to _rl_complete_sigcleanup so the match
- list gets freed on SIGINT; avoids possible memory leak pointed out
- by Garrett Cooper <yanegomi@gmail.com>
- - rl_complete_internal: in default switch case, call _rl_free_match_list
- before returning to avoid memory leak
-
-doc/bashref.texi
- - start at a set of examples for the =~ regular expression matching
- operator, touching on keeping the pattern in a shell variable and
- quoting portions of the pattern to remove their special meaning
-
- 12/1
- ----
-lib/glob/gmisc.c
- - extglob_pattern: new function, returns 1 if pattern passed as an
- argument looks like an extended globbing pattern
-
-lib/glob/glob.c
- - skipname: return 0 immediately if extglob_pattern returns non-zero,
- let the extended globbing code do the right thing with skipping
- names beginning with a `.'
- - mbskipname: return 0 immediately if extglob_pattern returns non-zero,
- let the extended globbing code do the right thing with skipping
- names beginning with a `.'. Fixes bug reported by Yongzhi Pan
- <panyongzhi@gmail.com>
-
- 12/2
- ----
-lib/glob/smatch.c
- - patscan, patscan_wc: no longer static so other parts of the glob
- library can use them, renamed to glob_patscan, glob_patscan_wc
-
-lib/glob/glob.c
- - extern declarations for glob_patscan, glob_patscan_wc
- - wchkname: new function, does skipname on wchar_t pattern and dname,
- old body of mbskipname after converting to wide chars
- - extglob_skipname: new function, checks all subpatterns in an extglob
- pattern to determine whether or not a filename should be skipped.
- Calls skipname for each subpattern. Dname is only skipped if all
- subpatterns indicate it should be. Better fix for bug reported by
- Yongzhi Pan <panyongzhi@gmail.com>
- - wextglob_skipname: wide-char version of extglob_skipname, calls
- wchkname instead of calling back into mbskipname for each
- subpattern to avoid problems with char/wchar_t mismatch
- - skipname: call extglob_skipname if extglob_pattern returns non-zero
- - mbskipname: call wextglob_skipname if extglob_pattern returns non-zero
- - mbskipname: short-circuit immediately if no multibyte chars in
- pattern or filename
-
-execute_cmd.c
- - execute_cond_node: added parens to patmatch assignment statement to
- make intent clearer
-
- 12/3
- ----
-configure.in,config.h.in
- - check for imaxdiv, define HAVE_IMAXDIV if present
-
-expr.c
- - expassign, exp2: use imaxdiv if available. Doesn't help with checks
- for overflow from 10/25
-
- 12/6
- ----
-lib/readline/complete.c
- - compute_lcd_of_matches: if we're ignoring case in the matches, only
- use what the user typed as the lcd if it matches the first match
- (after sorting) up to the length of what was typed (if what the
- user typed is longer than the shortest of the possible matches, use
- the shortest common length of the matches instead). If it doesn't
- match, use the first of the list of matches, as if case were not
- being ignored. Fixes bug reported by Clark Wang
- <dearvoid@gmail.com>
-
- 12/7
- ----
-builtins/cd.def
- - cd_builtin: add code to return error in case cd has more than one
- non-option argument, conditional on CD_COMPLAINS define (which is
- not defined anywhere)
-
-doc/{bash.1,bashref.texi}
- - note that additional arguments to cd following the directory name
- are ignored. Suggested by Vaclav Hanzl <hanzl@noel.feld.cvut.cz>
-
- 12/10
- -----
-lib/readline/input.c
- - rl_read_key: don't need to increment key sequence length here; doing
- it leads to an off-by-one error
-
-lib/readline/macro.c
- - rl_end_kbd_macro: after off-by-one error with rl_key_sequence_length
- fixed, can decrement current_macro_index by rl_key_sequence_length
- (length of key sequence that closes keyboard macro)
-
-lib/readline/readline.c
- - _rl_dispatch_subseq: fix extra increment of rl_key_sequence_length
- when ESC maps to a new keymap and we're converting meta characters
- to ESC+key
- - _rl_dispatch_subseq: better increment of rl_key_sequence_length
- before we dispatch to a function in the ISFUNC case (where the
- second increment above should have happened)
- - rl_executing_keyseq: the full key sequence that ended up executing
- a readline command. Available to the calling application, maintained
- by _rl_dispatch_subseq, indexed by rl_key_sequence_length
- - rl_executing_key: the key that was bound to the currently-executing
- readline command. Same as the `key' argument to the function
-
-lib/readline/readline.h
- - rl_executing_keyseq: extern declaration
- - rl_executing_key: extern declaration
- - rl_key_sequence_length: declaration moved here from rlprivate.h,
- now part of public interface
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_executing_keyseq_size, buffer size
- for rl_executing_keyseq
-
-lib/readline/doc/rltech.texi
- - documented new variables: rl_executing_key, rl_executing_keyseq,
- rl_key_sequence_length
-
- 12/13
- -----
-bashline.c
- - bash_execute_unix_command: replace ad-hoc code that searches
- cmd_xmap for correct command with call to rl_function_of_keyseq
- using rl_executing_keyseq; now supports key sequences longer
- than two characters. Fixes bug reported by Michael Kazior
- <kazikcz@gmail.com>
-
- 12/15
- -----
-make_cmd.c
- - make_function_def: don't null out source_file before calling
- make_command so it can be used later on when the function definition
- is executed
-
-execute_cmd.c
- - execute_intern_function: second argument is now FUNCTION_DEF *
- instead of COMMAND *
- - execute_command_internal: call execute_intern_function with the
- new second argument (the entire FUNCTION_DEF instead of just the
- command member)
- - execute_intern_function: if DEBUGGER is defined, call
- bind_function_def before calling bind_function, just like
- make_function_def does (might be able to take out the call in
- make_function_def depending on what the debugger does with it).
- Fixes bug reported by <dethrophes@motd005>
-
-expr.c
- - more minor changes to cases of INTMAX_MIN % -1 and INTMAX_MIN / 1;
- fix typos and logic errors
-
- 12/16
- -----
-bashline.c
- - find_cmd_start: change flags to remove SD_NOSKIPCMD so it skips over
- command substitutions and doesn't treat them as command separators
- - attempt_shell_completion: instead of taking first return from
- find_cmd_name as command name to use for programmable completion,
- use loop to skip over assignment statements. Fixes problem reported
- by Raphael Droz <raphael.droz+floss@gmail.com>
- - attempt_shell_completion: if we don't find a command name but the
- command line is non-empty, assume the other words are all assignment
- statements and flag that point is in a command position so we can
- do command name completion
- - attempt_shell_completion: if the word being completed is the first
- word following a series of assignment statements, and the
- command line is non-empty, flag that point is in a command position
- so we can do command name completion
-
-lib/readline/history.c
- - history_get_time: atol -> strtol
-
- 12/18
- -----
-parse.y
- - parser_in_command_position: external interface to the
- command_token_position macro for use by other parts of the shell,
- like the completion mechanism
-
-externs.h
- - extern declaration for parser_in_command_position
-
- 12/19
- -----
-
-builtins/read.def
- - read_builtin: make sure all calls to bind_read_variable are passed
- a non-null string. Fixes bug reported by Dan Douglas
- <ormaaj@gmail.com>
-
-bashline.c
- - attempt_shell_completion: mark that we're in a command position if
- we're at the start of the line and the parser is ready to accept
- a reserved word or command name. Feature most recently suggested
- by Peng Yu <pengyu.ut@gmail.com>
-
- 12/21
- -----
-lib/readline/bind.c
- - _rl_escchar: return the character that would be backslash-escaped
- to denote the control character passed as an argument ('\n' -> 'n')
- - _rl_isescape: return 1 if character passed is one that has a
- backslash escape
- - _rl_untranslate_macro_value: new second argument: use_escapes, if
- non-zero translate to backslash escapes where possible instead of
- using straight \C-x for control character `x'. Change callers
- - _rl_untranslate_macro_value: now global
-
-lib/readline/rlprivate.h
- - _rl_untranslate_macro_value: extern declaration
-
-lib/readline/{macro.c,readline.h}
- - rl_print_last_kbd_macro: new bindable function, inspired by patch
- from Mitchel Humpherys
-
-lib/readline/funmap.c
- - print-last-kbd-macro: new bindable command, bound to
- rl_print_last_kbd_macro
-
-lib/readline/doc/{rluser.texi,readline.3},doc/bash.1
- - print-last-kbd-macro: document.
-
-lib/readline/text.c
- - _rl_insert_next: if we're defining a macro, make sure the key gets
- added to the macro text (should really audit calls to rl_read_key()
- and make sure the right thing is happening for all of them)
-
-bashline.[ch]
- - print_unix_command_map: new function, prints all bound commands in
- cmd_xmap using rl_macro_dumper in a reusable format
-
-builtins/bind.def
- - new -X option: print all keysequences bound to Unix commands using
- print_unix_command_map. Feature suggested by Dennis Williamson
- (2/2011)
-
-doc/{bash.1,bashref.texi}
- - document new `bind -X' option
-
- 12/24
- -----
-
-doc/{bash.1,bashref.texi}
- - add a couple of sentences to the description of the case modification
- operators making it clearer that each character of parameter is
- tested against the pattern, and that the pattern should only attempt
- to match a single character. Suggested by Bill Gradwohl
- <bill@ycc.com>
-
- 12/28
- -----
-shell.c
- - init_noninteractive: instead of calling set_job_control(0) to
- unconditionally turn off job control, turn on job control if
- forced_interactive or jobs_m_flag is set
- - shell_initialize: call initialize_job_control with jobs_m_flag as
- argument so `bash -m script' enables job control while running the
- script
-
-jobs.c
- - initialize_job_control: if the `force' argument is non-zero, turn on
- job control even if the shell is not currently interactive
- (interactive == 0)
-
- 12/29
- -----
-
-flags.h
- - new extern declaration for jobs_m_flag
-
-builtins/{cd,set}.def,doc/{bash.1,bashref.texi}
- - added text clarifying the descriptions of cd -L and -P, suggested by
- Padraig Brady <p@draigbrady.com>
- - slight change to the description of `set -P' about resolving symbolic
- links
-
-lib/readline/doc/rluser.texi
- - Added an example to the programmable completion section: _comp_cd,
- a completion function for cd, with additional verbiage. Text
- includes a reference to the bash_completion project
-
- 1/1/2012
- --------
-jobs.c
- - set_job_status_and_cleanup: note that a job is stopped due to
- SIGTSTP (any_tstped) if job_control is set; there's no need to
- test interactive
-
- 1/5
- ---
-quit.h
- - LASTSIG(): new macro, expands to signal number of last terminating
- signal received (terminating_signal or SIGINT)
-
-trap.c
- - first_pending_trap: returns lowest signal number with a trap pending
- - trapped_signal_received: set to the last trapped signal the shell
- received in trap_handler(); reset to 0 in run_pending_traps
-
-builtins/read.def
- - read_builtin: changes to posix-mode (posixly_correct != 0) to make
- `read' interruptible by a trapped signal. After the trap runs,
- read returns 128+sig and does not assign the partially-read line
- to the named variable(s). From an austin-group discussion started
- by David Korn
-
- 1/11
- ----
-doc/{bash.1,bashref.texi}
- - slight changes to the descriptions of the compat32 and compat40 shell
- options to clarify their meaning
-
- 1/12
- ----
-lib/readline/{colors.[ch],parse-colors.[ch]}
- - new files, part of color infrastructure support
-
-Makefile.in,lib/readline/Makefile.in
- - arrange to have colors.o and parse-colors.o added to readline
- library
-
-{configure,config.h}.in
- - check for stdbool.h, define HAVE_STDBOOL_H if found
-
- 1/14
- ----
-lib/readline/bind.c
- - colored_stats: new bindable variable, enables using colors to
- indicate file type when listing completions
-
-lib/readline/complete.c
- - _rl_colored_stats: new variable, controlled by colored-stats bindable
- variable
- - colored_stat_start, colored_stat_end: new functions to set and reset
- the terminal color appropriately depending on the type of the
- filename to be printed
- - print_filename: changes to print colors if `colored-stats' variable
- set. Changes contributed by Raphael Droz
- <raphael.droz+floss@gmail.com>
-
-lib/readline/readline.c
- - rl_initialize_everything: add call to _rl_parse_colors to parse
- color values out of $LS_COLORS. May have to add to rl_initialize
- to make more dynamic if LS_COLORS changes (which doesn't happen
- very often, if at all)
-
-lib/readline/rlprivate.h
- - _rl_colored_stats: new extern declaration
-
-lib/readline/doc/{readline.3,rluser.texi},doc/bash.1
- - colored-stats: document new bindable readline variable
-
-lib/readline/colors.c
- - _rl_print_color_indicator: call rl_filename_stat_hook before calling
- lstat/stat so we can get color indicators for stuff like
- $HOME/Applications
-
-lib/readline/complete.c
- - stat_char: call rl_filename_stat_hook before calling lstat/stat
-
-findcmd.[ch],execute_cmd.c
- - search_for_command: now takes a second `flags' argument; changed
- header function prototype and callers
- - search_for_command: if (flags & 1), put the command found in $PATH
- into the command hash table (previous default behavior)
-
-execute_cmd.c
- - is_dirname: call search_for_command with flags argument of 0 so it
- doesn't try to put something in the command hash table
-
-bashline.c
- - bash_command_name_stat_hook: a hook function for readline's
- filename_stat_hook that does $PATH searching the same way that
- execute_cmd.c:execute_disk_command() does it, and rewrites the
- passed filename if found. Does not put names into command hash
- table. This allows command name completion to take advantage
- of `visible-stats' and `colored-stats' settings.
- - executable_completion: new function, calls the directory completion
- hook to expand the filename before calling executable_file or
- executable_or_directory; change command_word_completion_function to
- call executable_completion. This allows $HOME/bin/[TAB] to do
- command completion and display alternatives
-
- 1/17
- ----
-pcomplete.c
- - gen_command_matches: now takes a new second argument: the command
- name as deciphered by the programmable completion code and used
- to look up the compspec; changed callers (gen_compspec_completions)
- - gen_shell_function_matches: now takes a new second argument: the
- command that originally caused the completion function to be
- invoked; changed callers (gen_compspec_completions))
- - build_arg_list: now takes a new second argument: the command name
- corresponding to the current compspec; changed callers
- (gen_command_matches, gen_shell_function_matches)
- - build_arg_list: now uses `cmd' argument to create $1 passed to
- invoked command or shell function
- - gen_compspec_completions: if we skipped a null command at the
- beginning of the line (e.g., for completing `>'), add a new word for
- it at the beginning of the word list and increment nw and cw
- appropriately. This is all a partial fix for the shortcoming
- pointed out by Sung Pae <sungpae@gmail.com>
-
- 1/18
- ----
-
-{configure,config.h}.in
- - new check: check for AUDIT_USER_TTY defined in <linux/audit.h>,
- define HAVE_DECL_AUDIT_USER_TTY if both are found
-
-lib/readline/rlconf.h
- - ENABLE_TTY_AUDIT_SUPPORT: new define, allows use of the Linux kernel
- tty auditing system if it's available and enabled
-
-lib/readline/util.c
- - _rl_audit_tty: new function, send a string to the kernel tty audit
- system
-
-lib/readline/rlprivate.h
- - _rl_audit_tty: new extern declaration
-
-lib/readline/readline.c
- - readline: call _rl_audit_tty with line to be returned before returning
- it if the Linux tty audit system is available and it's been enabled
- in rlconf.h Original patch from Miroslav Trmac; recent request
- from Miroslav Lichvar <mlichvar@redhat.com>
-
- 1/21
- ----
-
-lib/readline/readline.c:
- - _rl_dispatch_subseq: add an inter-character timeout for multi-char
- key sequences. Suggested by <rogerx.oss@gmail.com>. Still needs
- work to make a user-settable variable
-
-parse.y
- - shell_getc: make code that uses the pop_alias dependent on ALIAS
- define
-
-variables.h
- - sv_tz: extern define should only depend on HAVE_TZSET
-
-expr.c
- - expr_streval: if ARRAY_VARS is not defined, set lvalue->ind to -1;
- move assignment to `ind' inside define
- - expr_bind_array_element: declaration and uses need to be #ifdef
- ARRAY_VARS
-
-arrayfunc.h
- - AV_ALLOWALL, AV_QUOTED, AV_USEIND: define to 0 if ARRAY_VARS not
- defined; used in subst.c unconditionally
-
-sig.h
- - make the signal blocking functions not dependent on JOB_CONTROL
-
-sig.c
- - sigprocmask: make the replacement definition not dependent on
- JOB_CONTROL
-
-trap.c
- - use BLOCK_SIGNAL/UNBLOCK_SIGNAL instead of code dependent on
- HAVE_POSIX_SIGNALS and BSD signals
-
- 1/24
- ----
-
-print_cmd.c
- - print_redirection_list: change the conditions under which
- r_duplicating_output_word is mapped to r_err_and_out to more or
- less match those used in redir.c. Fixes bug pointed out by
- Dan Douglas <ormaaj@gmail.com>
-
-
- 1/29
- ----
-lib/readline/signals.c
- - _rl_block_sigwinch,_rl_release_sigwinch: don't compile in bodies
- unless SIGWINCH is defined. Fixes bug reported by Pierre Muller
- <pierre.muller@ics-cnrs.unistra.fr>
-
-doc/{bash.1,bashref.texi}
- - small modifications to the introduction to the REDIRECTION section
- to describe how redirections can modify file handles
- - small modification to the section describing base#n to make it
- clearer that n can be denoted using non-numerics. From a posting
- by Linda Walsh <bash@tlinx.org>
-
- 2/2
- ---
-builtins/printf.def
- - printf_builtin: make sure vbuf is intialized and non-null when -v
- is supplied, since other parts of the code assume that it's not
- null (e.g., bind_printf_variable()). Fixes bug reported by Jim
- Avera <james_avera@yahoo.com>
-
- 2/4
- ---
-lib/readline/undo.c
- - _rl_free_undo_list: new function, old body of rl_free_undo_list,
- frees undo entries in UNDO_LIST * passed as argument
- - rl_free_undo_list: call _rl_free_undo_list
-
-lib/readline/rlprivate.h
- - _rl_free_undo_list: new extern declaration
- - _rl_keyseq_timeout: new extern declaration (see below)
-
-lib/readline/misc.c
- - rl_clear_history: new function. Clears the history list and frees
- all associated data similar to history.c:clear_history(), but
- takes rl_undo_list into account and frees and UNDO_LISTs saved as
- `data' members of a history list entry
-
-lib/readline/doc/rltech.texi
- - rl_clear_history: documented
-
-lib/readline/readline.c
- - _rl_keyseq_timeout: new variable to hold intra-key timeout value
- from 1/21 fix; specified in milliseconds. Default value is 500
- - _rl_dispatch_subseq: change to use _rl_keyseq_timeout as intra-key
- timeout if it's greater than 0; no timeout if <= 0
- - _rl_dispatch_subseq: don't check for queued keyboard input if we have
- pushed or pending input, or if we're reading input from a macro
-
-lib/readline/bind.c
- - keyseq-timeout: new bindable variable, shadows _rl_keyseq_timeout
- - string_varlist: add keyseq-timeout
- - sv_seqtimeout: new function to modify value of _rl_keyseq_timeout;
- clamps negative values at 0 for now
- - _rl_get_string_variable_value: return value for keyseq-timeout
-
-doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
- - keyseq-timeout: documented
-
-lib/readline/isearch.c
- - _rl_isearch_dispatch: modification to fix from 7/18 to not use
- cxt->keymap and cxt->okeymap, since by the time this code is
- executed, they are equal. Use `f' to check for rl_insert or
- unbound func
- - _rl_isearch_dispatch: if we're switching keymaps, not in
- callback mode, and don't have pending or pushed input, use
- _rl_input_queued to resolve a potentially ambiguous key sequence.
- Suggested by Roger Zauner <rogerx.oss@gmail.com>
- - _rl_isearch_dispatch: if we have changed keymaps and resolved to
- an editing function (not self-insert), make sure we stuff the
- right characters back onto the input after changing the keymap
- back so the right editing function is executed after the search
- is terminated. Rest of fix for bug reported by Roger Zauner
- <rogerx.oss@gmail.com>
-
- 2/5
- ---
-builtins/gen-helpfiles.c
- - new file: reads struct builtin and writes the long docs to files
- in the `helpdirs' subdirectory. The filename is given in the
- previously-unused `handle' member of the struct builtin. Links
- with `tmpbuiltins.o', which is created by Makefile to have the
- right long documentation. When not cross-compiling, gets the
- right #defines based on configuration options from config.h instead
- of trying to parse conditional parts of def files. Fixes
- shortcoming pointed out by Andreas Schwab <schwab@linux-m68k.org>
-
-builtins/Makefile.in
- - tmpbuiltins.c: new generated file, created to enable creation of
- separate helpfiles based on correct #defines instead of trying to
- parse conditional parts of def files
- - gen-helpfiles: new program to generate helpfiles, links with
- tmpbuiltins.o
- - HELPFILES_TARGET: new target, substituted by configure to `helpdoc'
- if separate helpfiles requested
- - targets: new target, libbuiltins.a and $(HELPFILES_TARGET)
- - CREATED_OBJECTS: new variable, holds created object files for
- make clean; changed make clean to remove created objects
- - helpdoc: changed to call gen-helpfiles instead of mkbuiltins
-
-Makefile.in
- - when building libbuiltins.a, recursively call make with `targets'
- argument to make sure separate helpfiles get built
-
-configure.in
- - substitute `helpdoc' as value of HELPFILES_TARGET if
- --enable-separate-helpfiles supplied as configure argument
-
-builtins/mkbuiltins.c
- - `-nofunctions': new argument, causes mkbuiltins to not write value
- for function implementing a particular builtin to struct builtin
- and to write document file name to `handle' member of struct builtin
- - no longer writes separate helpfiles; that is left to gen-helpfiles
-
- 2/8
- ---
-subst.c
- - make sure last_command_exit_value is set to a non-zero value before
- any calls to report_error, since `-e' set will short-circuit
- report_error. Fixes bug reported by Ewan Mellor
- <Ewan.Mellor@eu.citrix.com>
-
-variables.c
- - make_local_array_variable: added second argument; if non-zero,
- function will return an existing local associative array variable
- instead of insisting on an indexed array
-
-variable.h,subst.c
- - make_local_array_variable: changed prototype and caller
-
-builtins/declare.def
- - declare_internal: add second arg to call to make_local_array_variable;
- making_array_special, which indicates we're processing an
- assignment like declare a[b]=c. Fixes seg fault resulting from
- a being an already-declared local associative array variable in a
- function. Ubuntu bash bug 928900.
-
- 2/14
- ----
-
-execute_cmd.c
- - execute_command_internal: if redirections into or out of a loop fail,
- don't try to free ofifo_list unless saved_fifo is non-zero. It's
- only valid if saved_fifo is set
-
- 2/15
- ----
-{arrayfunc,braces,variables}.c
- - last_command_exit_value: make sure it's set before any calls to
- report_error, since -e will cause that to exit the shell
-
-builtins/common.c
- - get_job_by_name: call internal_error instead of report_error so this
- doesn't exit the shell
-
- 2/18
- ----
-builtins/evalstring.c
- - parse_and_execute: make sure the file descriptor to be redirected to
- is 1 before calling cat_file. One fix for bug reported by Dan Douglas
- <ormaaj@gmail.com>
-
-parse.y
- - read_token_word: don't return NUMBER if a string of all digits
- resolves to a number that overflows the bounds of an intmax_t.
- Other fix for bug reported by Dan Douglas <ormaaj@gmail.com>
-
- 2/19
- ----
-lib/sh/strtrans.c
- - ansicstr: use 0x7f as the boundary for characters that translate
- directly from ASCII to unicode (\u and \U escapes) instead of
- UCHAR_MAX, since everything >= 0x80 requires more than one byte.
- Bug and fix from John Kearney <dethrophes@web.de>
-
-builtins/printf.def
- - tescape: ditto for printf \u and \U escape sequences
-
- 2/20
- ----
-lib/sh/unicode.c
- - u32toutf8: fix to handle encodings up to six bytes long correctly
- (though technically UTF-8 only has characters up to 4 bytes long).
- Report and fix from John Kearney <dethrophes@web.de>
- - u32toutf8: first argument is now an unsigned 32-bit quantity,
- changed callers (u32cconv) to pass c instead of wc
- - u32reset: new function, resets local static state to uninitialized
- (locale information, currently)
-
-locale.c
- - call u32reset whenever LC_CTYPE/LC_ALL/LANG is changed to reset the
- cached locale information used by u32cconv. From a report from
- John Kearney <dethrophes@web.de>
-
- 2/21
- ----
-doc/{bash,builtins}.1
- - minor changes from Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
-
-lib/sh/unicode.c
- - u32cconv: only assume you can directly call wctomb on the passed
- value if __STDC_ISO_10646__ is defined and the value is <=
- 0x7fffffff
- - stub_charset: return locale as default instead of "ASCII", let
- rest of code decide what to do with it
-
-lib/readline/parens.c
- - _rl_enable_paren_matching: make paren matching work in vi insert
- mode. Bug report from <derflob@derflob.de>
-
- 2/22
- ----
-lib/sh/shquote.c
- - sh_backslash_quote: quote tilde in places where it would be
- expanded. From a report from John Kearney <dethrophes@web.de>
-
- 2/23
- ----
-execute_cmd.c
- - execute_pipeline: wrap the discard_unwind_frame call in #ifdef
- JOB_CONTROL, since the frame is only created if JOB_CONTROL is
- defined. Bug and fix from Doug Kehn <rdkehn@yahoo.com>
-
- 2/25
- ----
-error.c
- - report_error: make sure last_command_exit_value is non-zero before
- we call exit_shell, since the exit trap may reference it. Call
- exit_shell with last_command_exit_value to allow exit statuses
- other than 1
-
-unicode.c
- - stub_charset: use local static buffer to hold charset, don't change
- value returned by get_locale_var. Based on idea and code from
- John Kearney <dethrophes@web.de>
- - u32toutf16: function to convert unsigned 32-bit value (unicode) to
- UTF-16. From John Kearney <dethrophes@web.de>
- - u32cconv: call u32toutf16 if __STDC_ISO_10646__ defined and wchar_t
- is two bytes, send result to wcstombs, return if not encoding error.
- From John Kearney <dethrophes@web.de>
- - u32cconv: return UTF-8 conversion if iconv conversion to local
- charset is unsupported
-
- 3/2
- ---
-lib/readline/complete.c
- - print_filename: if there is no directory hook, but there is a stat
- hook, and we want to append a slash to directories, call the stat
- hook before calling path_isdir on the expanded directory name.
- Report and pointer to fix from Steve Rago <sar@nec-labs.com>
-
- 3/3
- ---
-builtins/evalstring.c
- - parse_and_execute: fix to change of 2/18: make sure the file
- descriptor being redirected to is 0 before calling cat_file when
- we see something like $(< file). Real fix for bug reported by
- Dan Douglas <ormaaj@gmail.com>
-
-subst.c
- - parameter_brace_patsub: run the replacement string through quote
- removal even if the expansion is within double quotes, because
- the parser and string extract functions treat the quotes and
- backslashes as special. If they're treated as special, quote
- removal should remove them (this is the Posix position and
- compatible with ksh93). THIS IS NOT BACKWARDS COMPATIBLE.
-
- 3/4
- ---
-lib/readline/complete.c
- - rl_menu_complete: fix to make show-all-if-ambiguous and
- menu-complete-display-prefix work together if both are set. Fix
- from Sami Pietila <sami.pietila@gmail.com>
-
- 3/5
- ---
-bashline.c
- - dircomplete_expand_relpath: new variable, if non-zero, means that
- `shopt -s direxpand' should expand relative pathnames. Zero by
- default, not user-settable yet
- - bash_directory_completion_hook: if we have a relative pathname that
- isn't changed by canonicalization or spell checking after being
- appended to $PWD, then don't change what the user typed. Controlled
- by dircomplete_expand_relpath
-
- 3/7
- ---
-m4/timespec.m4
- - new macros, cribbed from gnulib and coreutils: find out whether we
- have `struct timespec' and what file includes it
-
-m4/stat-time.m4
- - new macros, cribbed from gnulib and coreutils: find out whether the
- mtime/atime/ctime/etctime fields of struct stat are of type
- struct timespec, and what the name is
-
-include/stat-time.h
- - new file, cribbed from gnulib, with additions from coreutils: include
- the right file to get the struct timespec define, or provide our own
- replacement. Provides a bunch of inline functions to turn the
- appropriate members of struct stat into `struct timespec' values,
- zeroing out the tv_nsec field if necessary
-
-test.c
- - include "stat-time.h" for the nanosecond timestamp resolution stuff
- - stat_mtime: new function, returns struct stat and the mod time
- normalized into a `struct timespec' for the filename passed as the
- first argument
- - filecomp: call stat_mtime instead of sh_stat for each filename
- argument to get the mtime as a struct timespec
- - filecomp: call timespec_cmp instead of using a straight arithmetic
- comparison for the -nt and -ot operators, using timespec returned by
- stat_mtime. Added functionality requested by by Werner Fink
- <werner@suse.de> for systems that can support it
-
- 3/10
- ----
-include/posixdir.h
- - REAL_DIR_ENTRY: remove dependency on _POSIX_SOURCE, only use feature
- test macros to decide whether dirent.d_ino is present and usable;
- define D_INO_AVAILABLE. Report and fix from Fabrizion Gennari
- <fabrizio.ge@tiscali.it>
- - D_FILENO_AVAILABLE: define if we can use dirent.d_fileno
-
-lib/sh/getcwd.c
- - use D_FILENO_AVAILABLE to decide whether or not to compile in
- _path_checkino and whether or not to call it. Report and initial
- fix from Fabrizion Gennari <fabrizio.ge@tiscali.it>
-
-lib/readline/signals.c
- - make sure all occurrences of SIGWINCH are protected by #ifdef
-
-sig.c
- - make sure all occurrences of SIGCHLD are protected by #ifdef
-
-nojobs.c
- - make sure SA_RESTART is defined to 0 if the OS doesn't define it
-
-version.c
- - show_shell_version: don't use string literals in printf, use %s.
- Has added benefit of removing newline from string to be translated
-
-trap.c
- - queue_sigchld_trap: new function, increments the number of pending
- SIGCHLD signals by the argument, which is by convention the number
- of children reaped in a call to waitchld()
-
-trap.h
- - queue_sigchld_trap: new extern declaration
-
-jobs.c
- - waitchld: if called from the SIGCHLD signal handler (sigchld > 0),
- then call queue_sigchld_trap to avoid running the trap in a signal
- handler context. Report and original fix from Siddhesh Poyarekar
- <siddhesh@redhat.com>
-
-lib/sh/unicode.c
- - u32tocesc: take an unsigned 32-bit quantity and encode it using
- ISO C99 string notation (\u/\U)
- - u32cconv: call u32tocesc as a fallback instead of u32cchar
- - u32cconv: call u32tocesc if iconv cannot convert the character.
- Maybe do the same thing if iconv_open fails
- - u32reset: call iconv_close on localconv if u32init == 1
-
- 3/11
- ----
-config-top.h
- - CHECKWINSIZE_DEFAULT: new define, set to initial value of
- check_window_size (shopt checkwinsize): 0 for off, 1 for on.
- Default is 0
-
-{jobs,nojobs}.c
- - check_window_size: default initial value to CHECKWINSIZE_DEFAULT
-
- 3/13
- ----
-doc/bashref.texi
- - change text referring to the copying restrictions to that
- recommended by the FSF (no Front-Cover Texts and no Back-Cover
- Texts)
-
-lib/readline/doc/{history,rlman,rluserman}.texi
- - change text referring to the copying restrictions to that
- recommended by the FSF (no Front-Cover Texts and no Back-Cover
- Texts)
-
- 3/15
- ----
-array.c
- - LASTREF_START: new macro to set the starting position for an array
- traversal to `lastref' if that's valid, and to the start of the array
- if not. Used in array_reference, array_insert, array_remove
- - array_remove: try to be a little smarter with lastref instead of
- unconditionally invalidating it
-
- 3/16
- ----
-array.c
- - array_insert: fix memory leak by deleting element to be added in the
- case of an error
-
- 3/18
- ----
-lib/sh/mbschr.c
- - mbschr: don't call mbrlen unless is_basic is false; devolves to a
- straight character-by-character run through the string
-
- 3/19
- ----
-stringlib.c
- - substring: use memcpy instead of strncpy, since we know the length
- and are going to add our own NUL terminator
-
- 3/20
- ----
-subst.c
- - parameter_brace_expand_rhs: if expand_string_for_rhs returns a quoted
- null string (a list with one element for which
- QUOTED_NULL(list->word->word) returns true), return the quoted null
- and set the flags in the returned word to indicate it. Fixes bug
- reported by Mark Edgar <medgar123@gmail.com>
-
-lib/sh/tmpfile.c
- - use random(3) instead of get_random_number to avoid perturbing the
- random sequence you get using $RANDOM. Bug report and fix from
- Jurij Mihelic <jurij.mihelic@fri.uni-lj.si>
-
- 3/21
- ----
-config-top.h
- - OPTIMIZE_SEQUENTIAL_ARRAY_ASSIGNMENT: define to 1 to optimize
- sequential indexed array assignment patterns. Defined to 1 by
- default
-
-array.c
- - array_insert: if OPTIMIZE_SEQUENTIAL_ARRAY_ASSIGNMENT is defined,
- start the search at lastref (see change from 3/15)
-
- 3/27
- ----
-print_cmd.c
- - debug_print_word_list: new debugging function, prints a word list
- preceded by an optional string and using a caller-specified
- separator
-
- 4/1
- ---
-command.h
- - W_ASSNGLOBAL: new flag, set to indicate declare -g
-
-execute_cmd.c
- - fix_assignment_words: note that we have a -g argument to an assignment
- builtin and set the W_ASSNGLOBAL flag in the variable word
-
-subst.c
- - dump_word_flags: print out W_ASSNGLOBAL if present
- - do_assignment_internal: only set ASS_MKLOCAL if W_ASSIGNARG is set
- and W_ASSNGLOBAL is not. Don't want to create a local variable even
- if variable_context is non-zero if ASSNGLOBAL is set. Fixes bug
- reported by Bill Gradwohl <bill@ycc.com>
-
- 4/7
- ---
-lib/readline/readline.c
- - _rl_dispatch_subseq: make the `keyseq-timeout' variable apply to
- ESC processing when in vi mode. After hitting ESC, readline will
- wait up to _rl_keyseq_timeout*1000 microseconds (if set) for
- additional input before dispatching on the ESC and switching to
- command/movement mode. Completes timeout work suggested by
- <rogerx.oss@gmail.com>; this prompted by report from Barry Downes
- <barry.downes@gmail.com>
-
-lib/sh/shmbchar.c
- - sh_mbsnlen: new function, returns the number of (possibly multibyte)
- characters in a passed string with a passed length, examining at most
- maxlen (third argument) bytes
-
-externs.h
- - sh_mbsnlen: extern declaration for new function
-
-shell.c
- - exit_shell: call maybe_save_shell_history if remember_on_history is
- set, not just in interactive shells. That means the history is
- saved if history is enabled, regardless of whether or not the shell
- is interactive
-
-doc/{bash.1,bashref.texi}
- - TMOUT: fix description to make it explicit that TMOUT is the timeout
- period for a complete line of input, not just any input. Fixes
- problem reported in Ubuntu bug 957303:
- https://bugs.launchpad.net/ubuntu/+source/bash/+bug/957303
- - HISTFILE: document change to write history list to history file in
- any shell with history enabled, not just interactive shells. This
- seems to be more logical behavior. Suggested by Greg Wooledge
- <wooledg@eeg.ccf.org>
-
- 4/12
- ----
-lib/readline/colors.h
- - only include stdbool.h if HAVE_STDBOOL_H is defined
- - if HAVE_STDBOOL_H is not defined, provide enough definition for the
- library to use `bool', `true', and `false'
-
-lib/readline/parse-colors.[ch]
- - don't try to include <stdbool.h> at all; rely on colors.h to do it
-
-lib/sh/snprintf.c
- - vsnprintf_internal: only treat '0' as a flag to indicate zero padding
- if `.' hasn't been encountered ((flags&PF_DOT) == 0); otherwise treat
- it as the first digit of a precision specifier. Fixes bug reported
- by Petr Sumbera <petr.sumbera@sun.com>
-
- 4/15
- ----
-lib/sh/snprintf.c
- - vsnprintf_internal: if the '0' and '-' flags both occur, the '0'
- flag is ignored -- Posix. Start of a series of fixes based on
- tests and patches from Petr Sumbera <petr.sumbera@sun.com>
- - PUT_PLUS: make sure PF_PLUS flag is specified before putting the `+'
- - vsnprintf_internal: when '+' is read as a flag, don't set right-
- justify flag if the LADJUST (`-') flag has already been supplied
- - floating: make sure to output space padding before the `+', zero
- padding after
- - exponent: make sure to output space padding before the `+', zero
- padding after
- - exponent: only subtract one from the width for the decimal point
- if we're really going to print one
- - floating: use presence of PF_PLUS flag to decide whether to account
- for the `+' in the padded field width. Ditto for exponent()
-
- 4/16
- ----
-lib/sh/snprintf.c
- - vsnprint_internal: only reduce precision by 1 when processing the `g'
- format if it's > 0. A precision of 0 should stay 0; otherwise it
- gets set to -1 (NOT_FOUND) and converted to the default
- - number, lnumber: if an explicit precision is supplied, turn off the
- zero-padding flag and set the pad character back to space
- - number, lnumber: only account for a `+' when performing the field
- width calculation if the coversion is base 10; we don't add a `+'
- for other bases
-
- 4/18
- ----
-tests/printf3.sub
- - try using "perl -e 'print time'" to get the current time in seconds
- since the epoch if "date +%s" is not available (solaris 8-10)
-
- 4/19
- ----
-tests/run-printf
- - use cat -v instead of relying on diff -a being available to convert
- control characters to ascii and avoid the dreaded "Binary files
- /tmp/xx and printf.right differ"
-
- 4/20
- ----
-lib/sh/strftime.c
- - incoporated new version from Aharon Robbins <arnold@skeeve.com>
-
- 4/22
- ----
-doc/{bash.1,bashref.texi}
- - slight change to the description of /dev/tcp and /dev/udp
-
-subst.c
- - match_wpattern: logic fix to the calculation of `simple' (was |=,
- needs to be &=). Bug report from Mike Frysinger <vapier@gentoo.org>,
- fix from Andreas Schwab <schwab@linux-m68k.org>
-
-bashline.c
- - bash_filename_stat_hook: add code from bash_directory_completion_hook
- that performs pathname canonicalization in the same way that cd and
- other builtins will do
-
- 4/25
- ----
-execute_cmd.c
- - execute_pipeline: change the call to move_to_high_fd to make it use
- getdtablesize() and to not stomp on existing open file descriptors,
- like the fd the shell is using to read a script. Bug report from
- Greg Wooledge <wooledg@eeg.ccf.org>
-
- 5/6
- ---
-subst.c
- - expand_word_internal: case '$': after calling param_expand and
- setting had_quoted_null, set TEMP to null. The code that builds the
- returned string at the end of the function will take care of making
- and returning a quoted null string if there's nothing else in
- ISTRING. If there is, the quoted null should just go away. Part of
- fix for bug reported by Ruediger Kuhlmann <RKuhlmann@orga-systems.com>
- - expand_word_internal: when processing ISTRING to build return value,
- only set W_HASQUOTEDNULL in the returned word flags if the word is
- a quoted null string AND had_quoted_null is set. Rest of fix
-
- 5/9
- ---
-variables.c
- - bind_variable_internal: if we get an array variable here (implicit
- assignment to index 0), call make_array_variable_value, which
- dummies up a fake SHELL_VAR * from array[0]. This matters when
- we're appending and have to use the current value
- - bind_variable_internal: after computing the new value, treat assoc
- variables with higher precedence than simple array variables; it
- might be that a variable has both attributes set
-
-arrayfunc.c
- - bind_array_var_internal: break code out that handles creating the
- new value to be assigned to an array variable index into a new
- function, make_array_variable_value. This handles creating a
- dummy SHELL_VAR * for implicit array[0] assignment. Fixes bug
- reported by Dan Douglas <ormaaj@gmail.com>
-
-arrayfunc.h
- - make_array_variable_value: new extern declaration
-
- 5/19
- ----
-variables.c
- - bind_int_variable: if an assignment statement like x=y comes in
- from the expression evaluator, and x is an array, handle it like
- x[0]=y. Fixes bug reported by Dan Douglas <ormaaj@gmail.com>
-
- 5/24
- ----
-
-braces.c
- - mkseq: handle possible overflow and break the sequence generating
- loop if it occurs. Fixes OpenSUSE bug 763591:
- https://bugzilla.novell.com/show_bug.cgi?id=763591
-
- 5/25
- ----
-Makefile.in
- - LDFLAGS_FOR_BUILD: add to compilation recipes for build tools
- buildversion, mksignames, mksyntax
- - LDFLAGS_FOR_BUILD: add to compilation recipes for test tools
- recho, zecho, printenv, xcase
-
-builtins/Makefile.in
- - LDFLAGS_FOR_BUILD: add to compilation recipes for build tools
- gen-helpfiles, psize.aux
-
-variables.c
- - bind_int_variable: if LHS is a simple variable name without an array
- reference, but resolves to an array variable, call
- bind_array_variable with index 0 to make x=1 equivalent to x[0]=1.
- Fixes bug reported by Dan Douglas <ormaaj@gmail.com>
-
- 5/27
- ----
-subst.c
- - expand_word_internal: make sure has_dollar_at doesn't get reset before
- recursive calls to param_expand or expand_word_internal, since it has
- to save state of what came before. Use temp variable and make sure
- has_dollar_at is incremented if recursive call processes "$@".
- Fixes bug reported by gregrwm <backuppc-users@whitleymott.net> and
- supplemented by Dan Douglas <ormaaj@gmail.com>
-
-doc/{bash.1,bashref.texi}
- - changes to the description of substring expansion inspired by
- suggestions from Bill Gradwohl <bill@ycc.com>
-
-doc/bashref.texi
- - added substring expansion examples inspired by suggestions from
- Bill Gradwohl <bill@ycc.com>
-
-variables.c
- - find_shell_variable: search for a variable in the list of shell
- contexts, ignore the temporary environment
- - find_variable_tempenv: search for a variable in the list of shell
- contexts, force search of the temporary environment
- - find_variable_notempenv: search for a variable in the list of shell
- contexts, don't force search of the temporary environment
-
-variables.h
- - find_shell_variable: extern declaration
- - find_variable_tempenv: extern declaration
- - find_variable_notempenv: extern declaration
-
-arrayfunc.c
- - bind_array_variable: call find_shell_variable instead of calling
- var_lookup directly
-
-findcmd.c
- - search_for_command: call find_variable_tempenv instead of
- find_variable_internal directly
- - _find_user_command_internal: call find_variable_tempenv instead of
- find_variable_internal directly
-
-builtins/setattr.def
- - set_var_attribute: call find_variable_notempenv instead of
- find_variable_internal directly
- - show_name_attributes: call find_variable_tempenv instead of
- find_variable_internal directly
-
- 6/1
- ---
-sig.c
- - termsig_handler: don't try to save the shell history on a terminating
- signal any more, since it just causes too many problems on Linux
- systems using glibc and glibc malloc
-
-lib/readline/vi_mode.c
- - rl_vi_change_to: change to correctly redo `cc', since `c' is not a vi
- motion character. From Red Hat bug 813289
- - rl_vi_delete_to: change to correctly redo `dd', since `d' is not a vi
- motion character
- - rl_vi_yank_to: change to correctly redo `yy', since `y' is not a vi
- motion character
-
- 6/4
- ---
-lib/sh/mktime.c
- - current versions of VMS do not need to include <stddef.h>. Fix from
- John E. Malmberg <wb8tyw@qsl.net>
-
- 6/5
- ---
-lib/sh/eaccess.c
- - sh_stat: instead of using a static buffer to do the DEV_FD_PREFIX
- translation, use a dynamically-allocated buffer that we keep
- resizing. Fixes potential security hole reported by David Leverton
- <levertond@googlemail.com>
-
- 6/5
- ---
-braces.c
- - expand_seqterm: check errno == ERANGE after calling strtoimax for
- rhs and incr. Part of a set of fixes from Scott McMillan
- <scotty.mcmillan@gmail.com>
- - expand_seqterm: incr now of type `intmax_t', which changes
- arguments to mkseq
- - mkseq: a better fix for detecting overflow and underflow since it's
- undefined in C and compilers `optimize' out overflow checks. Uses
- ADDOVERFLOW and SUBOVERFLOW macros
- - mkseq: use sh_imaxabs (new macro) instead of abs() for intmax_t
- variables
- - mkseq: don't allow incr to be converted to -INTMAX_MIN
- - mkseq: make sure that strvec_create isn't called with a size argument
- greater than INT_MAX, since it only takes an int
-
- 6/6
- ---
-braces.c
- - mkseq: try and be smarter about not overallocating elements in
- the return array if the increment is not 1 or -1
-
- 6/7
- ---
-parse.y
- - history_delimiting_chars: if the parser says we're in the middle of
- a compound assignment (PST_COMPASSIGN), just return a space to avoid
- adding a stray semicolon to the history entry. Fixes bug reported
- by "Davide Brini" <dave_br@gmx.com>
-
- 6/8
- ---
-bashline.c
- - bash_directory_completion_hook: don't attempt spelling correction
- on the directory name unless the direxpand option is set and we are
- going to replace the directory name with the corrected one in the
- readline line. Suggested by Linda Walsh <bash@tlinx.org>
-
-lib/sh/shquote.c
- - sh_backslash_quote: now takes a third argument: flags. If non-zero,
- tildes are not backslash-escaped. Have to handle both printf %q,
- where they should be escaped, and filename completion, where they
- should not when used as usernames
-
-externs.h
- - sh_backslash_quote: declaration now takes a third argument
-
-builtins/printf.def
- - printf_builtin: call sh_backslash_quote with 1 as third argument
- so tildes get escaped
-
-{bashline,bracecomp}.c
- - call sh_backslash_quote with 0 as third argument so tildes are not
- escaped in completed words
-
-doc/bash.1
- - add `coproc' to the list of reserved words. From a report by
- Jens Schweikhardt <schweikh@schweikhardt.net>
-
- 6/10
- ----
-execute_cmd.c
- - line_number_for_err_trap: now global, so parse_and_execute can save
- and restore it with unwind-protect
-
-builtins/evalstring.c
- - parse_prologue: save and restore line_number_for_err_trap along
- with line_number
- - restore_lastcom: new function, unwind-protect to restore
- the_printed_command_except_trap
- - parse_prologue: use restore_lastcom to save and restore the value
- of the_printed_command_except_trap around calls to parse_and_execute
- (eval/source/.)
-
- 6/15
- ----
-lib/readline/complete.c
- - complete_fncmp: change filename comparison code to understand
- multibyte characters, even when doing case-sensitive or case-mapping
- comparisons. Fixes problem reported by Nikolay Shirokovskiy
- <nshyrokovskiy@gmail.com>
-
- 6/20
- ----
-builtins/mapfile.def
- - mapfile: move the line count increment and check for having read
- the specified number of lines to the end of the loop to avoid
- reading an additional line with zgetline. Fixes bug reported by
- Dan Douglas <ormaaj@gmail.com>
-
- 6/21
- ----
-
-execute_cmd.c
- - execute_pipeline: make sure `lastpipe_flag' is initialized to 0 on
- all systems, since it's tested later in the function. Fixes bug
- reported by John E. Malmberg <wb8tyw@qsl.net>
-
- 6/22
- ----
-mailcheck.c
- - file_mod_date_changed: return 0 right away if mailstat() does not
- return success. Fixes bug with using uninitialized values reported
- by szymon.kalasz@uj.edu.pl
-
-builtins/set.def
- - the `monitor' option is not available when the shell is compiled
- without job control, since the underlying `m' flag is not available
-
-nojobs.c
- - job_control: now declared as int variable, initialized to 0, never
- modified
-
-jobs.h
- - job_control: extern declaration no longer dependent on JOB_CONTROL
-
-execute_cmd.c
- - execute_pipeline: made necessary changes so `lastpipe' shell option
- is now available in all shells, even those compiled without
- JOB_CONTROL defined
-
- 6/23
- ----
-lib/glob/glob.c
- - glob_filename: check for interrupts before returning if glob_vector
- returns NULL or an error. Bug reported by Serge van den Boom
- <svdb@stack.nl>, fix from Andreas Schwab <schwab@linux-m68k.org>
- - call run_pending_traps after each call to QUIT or test of
- interrupt_state, like we do in mainline shell code
- - glob_vector: don't call QUIT; in `if (lose)' code block; just free
- memory, return NULL, and let callers deal with interrupt_state or
- other signals and traps
-
- 6/25
- ----
-lib/readline/input.c
- - rl_read_key: restructure the loop that calls the event hook a little,
- so that the hook is called only after rl_gather_tyi returns no input,
- and any pending input is returned first. This results in better
- efficiency for processing pending input without calling the hook
- on every input character as bash-4.1 did. From a report from
- Max Horn <max@quendi.de>
-
- 6/26
- ----
-trap.c
- - signal_is_pending: return TRUE if SIG argument has been received and
- a trap is waiting to execute
-
-trap.h
- - signal_is_pending: extern declaration
-
-lib/glob/glob.c
- - glob_vector: check for pending SIGINT trap each time through the loop,
- just like we check for interrupt_state or terminating_signal, and
- set `lose = 1' so we clean up after ourselves and interrupt the
- operation before running the trap. This may require a change later,
- maybe call run_pending_traps and do that if run_pending_traps returns?
-
-variables.c
- - sv_histtimefmt: set history_comment_character to default (`#') if
- it's 0 when we're turning on history timestamps. The history code
- uses the history comment character to prefix timestamps, and
- leaving it at 0 effectively removes them from the history. From a
- report to help-bash by Dennis Williamson <dennistwilliamson@gmail.com>
-
- 6/27
- ----
-lib/readline/signals.c
- - rl_maybe_restore_sighandler: new function, sets handler for SIG to
- HANDLER->sa_handler only if it's not SIG_IGN. Needs to be called
- on same signals set using rl_maybe_set_sighandler, which does not
- override an existing SIG_IGN handler (SIGALRM is ok since it does
- the check inline; doesn't mess with SIGWINCH)
-
- 6/30
- ----
-variables.h
- - additional defines for the new `nameref' variable attribute
- (att_nameref): nameref_p, nameref_cell, var_setref
-
-variables.c
- - find_variable_nameref: resolve SHELL_VAR V through chain of namerefs
- - find_variable_last_nameref: resolve variable NAME until last in a
- chain of possibly more than one nameref starting at shell_variables
- - find_global_variable_last_nameref: resolve variable NAME until last
- in a chain of possibly more than one nameref starting at
- global_variables
- - find_nameref_at_context: resolve SHELL_VAR V through chain of namerefs
- in a specific variable context (usually a local variable hash table)
- - find_variable_nameref_context: resolve SHELL_VAR V through chain of
- namerefs following a chain of varible contexts
- - find_variable_last_nameref_context: resolve SHELL_VAR V as in
- find_variable_last_context, but return the final nameref instead of
- what the final nameref resolves to
- - find_variable_tempenv, find_variable_notempenv, find_global_variable,
- find_shell_variable, find_variable: modified to follow namerefs
- - find_global_variable_noref: look up a global variable without following
- any namerefs
- - find_variable_noref: look up a shell variable without following any
- namerefs
- - bind_variable_internal: modify to follow a chain of namerefs in the
- global variables table; change to handle assignments to a nameref by
- following nameref chain
- - bind_variable: modify to follow chain of namerefs when binding to a
- local variable
- - unbind_variable: changes to unset nameref variables (unsets both
- nameref and variable it resolves to)
-
-subst.c
- - parameter_brace_expand_word: change to handle expanding nameref whose
- value is x[n]
- - parameter_brace_expand_indir: change to expand in ksh93-compatible
- way if variable to be indirected is nameref and a simple (non-array)
- expansion
- - param_expand: change to expand $foo where foo is a nameref whose value
- is x[n]
-
-execute_cmd.c
- - execute_for_command: changes to implement ksh93 semantics when index
- variable is a nameref
-
-builtins/setattr.def
- - show_var_attributes: change to add `n' to flags list if att_nameref
- is set
-
-builtins/set.def
- - unset_builtin: changes to error messages to follow nameref variables
-
-builtins/declare.def
- - document new -n option
- - declare_internal: new `-n' and `+n' options
- - declare_internal: handle declare -n var[=value] and
- declare +n var[=value] for existing and non-existant variables.
- Enforce restriction that nameref variables cannot be arrays.
- Implement semi-peculiar ksh93 semantics for typeset +n ref=value
-
- 7/5
- ---
-variables.c
- - unbind_variable: unset whatever a nameref resolves to, leaving the
- nameref variable itself alone
- - unbind_nameref: new function, unsets a nameref variable, not the
- variable it references
-
-variables.h
- - unbind_nameref: extern declaration
-
-builtins/set.def
- - unset_builtin: modify to add -n option, which calls unbind_nameref
- leaving unbind_variable for the usual case. This required slight
- changes and additions to the test suite
-
-doc/{bash.1,bashref.texi}
- - document namerefs and typeset/declare/local/unset -n
-
- 7/13
- ----
-lib/sh/casemod.c
- - include shmbchar.h for is_basic and supporting pieces
- - sh_casemod: use _to_wupper and _to_wlower to convert wide character
- case instead of TOUPPER and TOLOWER. Fixes bug reported by
- Dennis Williamson <dennistwilliamson@gmail.com>, fix from
- Andreas Schwab <schwab@linux-m68k.org>
- - cval: short-circuit and return ascii value if is_basic tests true
- - sh_casemod: short-circuit and use non-multibyte case modification
- and toggling code if is_basic tests true
-
-lib/readline/signals.c
- - _rl_{block,release}_sigint: remove the code that actually blocks and
- releases the signals, since we defer signal handling until calls to
- RL_CHECK_SIGNALS()
-
-lib/readline/{callback,readline,util}.c
- - if HAVE_POSIX_SIGSETJMP is defined, use sigsetjmp/siglongjmp without
- saving and restoring the signal mask instead of setjmp/longjmp
-
-lib/readline/rltty.c
- - prepare_terminal_settings: don't mess with IXOFF setting if
- USE_XON_XOFF defined
-
-doc/{bash.1,bashref.texi}
- - add some text to the description of set -e clarifying its effect
- on shell functions and shell function execution. Suggested by
- Rainer Blome <rainer.blome@gmx.de>
-
-bashline.c
- - edit_and_execute_command: increment current_command_line_count before
- adding partial line to command history (for command-oriented-history
- because of rl_newline at beginning of function), then reset it to 0
- before adding the dummy history entry to make sure the dummy entry
- doesn't get added to previous incomplete command. Partial fix for
- problem reported by Peng Yu <pengyu.ut@gmail.com>
-
- 7/24
- ----
-configure.in
- - interix: define RECYCLES_PIDS. Based on a report from Michael
- Haubenwallner <michael.haubenwallner@salomon.at>
-
- 7/26
- ----
-jobs.c
- - make_child: call bgp_delete on the newly-created pid unconditionally.
- Some systems reuse pids before cycling through an entire set of
- CHILD_MAX/_SC_CHILD_MAX unique pids. This is no longer dependent
- on RECYCLES_PIDS. Based on a report from Michael Haubenwallner
- <michael.haubenwallner@salomon.at>
-
-support/shobj-conf
- - Mac OS X: drop MACOSX_DEPLOYMENT_TARGET=10.3 from the LDFLAGS. We
- can finally kill Panther
-
- 7/28
- ----
-subst.c
- - command_substitute: make sure last_made_pid gets reset if make_child
- fails
-
-execute_cmd.c
- - execute_command_internal: case cm_simple: decide whether or not to
- wait_for a child if already_making_children is non-zero, indicates
- that there is an unwaited-for child. More of fix for bug report
- from Michael Haubenwallner <michael.haubenwallner@salomon.at>
-
-jobs.c
- - make_child: call delete_old_job (new_pid) unconditionally, don't
- bother to check whether or not pid wrap occurred. Rest of fix for
- bug report from Michael Haubenwallner
- <michael.haubenwallner@salomon.at>
-
- 7/29
- ----
-shell.c
- - subshell_exit: new function, exits the shell (via call to sh_exit())
- after calling any defined exit trap
-
-externs.h
- - subshell_exit: new extern declaration
-
-execute_cmd.c
- - execute_command_internal: make sure to call subshell_exit for
- {} group commands executed asynchronously (&). Part of fix for
- EXIT trap bug reported by Maarten Billemont <lhunath@lyndir.com>
-
-sig.c
- - reset_terminating_signals: make sure to set termsigs_initialized back
- to 0, so a subsequent call to initialize_terminating_signals works
- right. Rest of fix for bug reported by Maarten Billemont
- <lhunath@lyndir.com>
-
-{execute_cmd,general,jobs,mailcheck,mksyntax,test}.c
-builtins/{cd,fc,pushd,ulimit}.def
-lib/malloc/getpagesize.h
-lib/sh/{clktck,fpurge,inet_aton,mailstat,oslib,pathcanon,pathphys,spell,strerror}.c
- - make inclusion of <sys/param.h> dependent on HAVE_SYS_PARAM_H
- consistently
-
- 8/6
- ---
-lib/readline/histexpand.c
- - history_expand_internal: now takes an additional argument saying
- whether the history expansion occurs within a quoted string, set to
- the open quote character
- - history_expand_internal: use new argument instead of checking prev
- char and initializing quoted_search_delimiter, pass qc directly to
- get_history_event, where it allows a matching quote to terminate a
- string defining an event
- - history_expand: change single-quote handling code so that if
- history_quotes_inhibit_expansion is 0, single quotes are treated
- like double quotes
- - history_expand: change call to history_expand_internal to pass new
- argument of `"' if double-quoted string, `'' if single-quoted string;
- this lets history_expand decide what is a quoted string and what
- is not
-
- 8/7
- ---
-configure.in
- - AC_CANONICAL_BUILD: invoke for later use
-
-lib/readline/macro.c
- - _rl_prev_macro_key: new function, inverse of _rl_next_macro_key:
- backs up the index into the current macro by 1
-
-lib/readline/rlprivate.h
- - _rl_prev_macro_key: extern declaration
-
-
-lib/readline/readline.c
- - _rl_dispatch_subseq, _rl_subseq_result: don't call _rl_unget_char
- if we're currently reading from a macro; call _rl_prev_macro_key
- instead. Fixes bug reported by Clark Wang <clark.wang@oracle.com>
-
- 8/13
- ----
-builtins/evalstring.c
- - evalstring(): new function, wrapper around parse_and_execute.
- make sure we handle cases where parse_and_execute can call `return'
- and short-circuit without cleaning up properly. We call
- parse_and_execute_cleanup() then jump to the previous-saved return
- location
-
-builtins/common.h
- - extern declaration for evalstring()
-
-builtins/eval.def
- - eval_builtin: make sure we handle `eval " ... return"' in contexts
- where `return' is valid by calling evalstring(). Fixes bug with
- `eval return' in sourced files reported by Clark Wang
- <dearvoid@gmail.com>
-
-trap.c
- - run_pending_traps: call evalstring instead of parse_and_execute.
- XXX - still needs to handle saving and restoring token state in the
- presence of `return'; could use unwind_protects for that
-
-builtins/mapfile.def
- - run_callback: call evalstring instead of parse_and_execute
-
- 8/15
- ----
-bashline.c
- - bash_filename_stat_hook: make sure we don't free local_dirname
- before using it to canonicalize any expanded filename. Make sure
- it always points to *dirname and only free it if we're replacing
- it.
-
-lib/readline/complete.c
- - append_to_match: make sure we call rl_filename_stat_hook with
- newly-allocated memory to avoid problems with freeing it twice
-
- 8/17
- ----
-variables.c,config-top.h
- - if ARRAY_EXPORT is defined to 1 when variables.c is compiled, the
- code that allows indexed arrays to be exported is enabled and
- included
-
- 8/19
- ----
-shell.c
- - call start_debugger from main() only if dollar_vars[1] != 0 (close
- enough to a non-interactive shell, since we can be interactive with
- -i while running a shell script). Fixes oddity reported by
- Techlive Zheng <techlivezheng@gmail.com>
-
- 8/20
- ----
-arrayfunc.c
- - quote_array_assignment_chars: don't bother quoting if the word has
- not been marked as an assignment (W_ASSIGNMENT)
- - quote_array_assignment_chars: turn on W_NOGLOB in the word flags
- so assignment statements don't undergo globbing. Partial fix for
- problems reported by Dan Douglas <ormaaj@gmail.com>
-
- 8/21
- ----
-command.h
- - W_NOBRACE: new word flag that means to inhibit brace expansion
-
-subst.c
- - brace_expand_word_list: suppress brace expansion for words with
- W_NOBRACE flag
-
- 8/22
- ----
-builtins/read.def
- - read_builtin: don't call dequote_string on what we've read, even if
- we saw an escape character, unless (input_string && *input_string).
- We may have escaped an IFS whitespace character. Fixes seg fault
- reported by <armandsl@gmail.com>
-
-execute_cmd.c
- - execute_command_internal: set the_printed_command_except trap when
- about to execute a ( ... ) user subshell. For now, set it only if
- ERR is trapped; can relax that later. Fixes bug reported by
- Mike Frysinger <vapier@gentoo.org>
-
- 8/23
- ----
-jobs.c
- - remove references to first_pid and pid_wrap, since we're not using
- them for anything anymore
-
- 8/24
- ----
-subst.c
- - changes for W_NOBRACE everywhere appropriate: so it can be displayed
- for debugging, and passed out of expand_word_internal
-
-doc/{bash.1,bashref.texi}
- - small changes to make it clearer that the = and == operators are
- equivalent, and will cause pattern matching when used with [[.
- From a question from Michal Soltys <soltys@ziu.info>
-
-doc/bashref.texi
- - some small formatting changes from Karl Berry <karl@freefriends.org>
-
- 8/27
- ----
-lib/readline/doc/{history,rlman,rluserman}.texi
- - some small formatting changes from Karl Berry <karl@freefriends.org>
-
-arrayfunc.c
- - assign_array_element_internal, assign_compound_array_list,
- unbind_array_element, array_value_internal: changes to make
- assignment statements to negative indices (a[-1]=2) and unsetting
- array elements using negative indices (unset 'a[-1]') work.
- From suggestions by Dennis Williamson <dennistwilliamson@gmail.com>
- and Chris F. A. Johnson <chris@cfajohnson.com>
-
-subst.c
- - array_length_reference: changes to make length references to array
- elements using negative indices (${#a[-1]}) work
-
- 8/28
- ----
-doc/{bash.1,bashref.texi}
- - document new treatment of negative indices to indexed arrays when
- assigning, referencing, calculating length, and unsetting
-
- 8/29
- ----
-shell.c
- - show_shell_usage: add -l to list of shell invocation options (short
- for --login). From Red Hat bug 852469
-
-configure.ac
- - renamed from configure.in, as latest autoconf versions want. Patches
- Stefano Lattarini <stefano.lattarini@gmail.com>
-
-MANIFEST,Makefile.in,doc/bashref.texi,support/mkconffiles
- - configure.in -> configure.ac
-
- 9/1
- ---
-
-parse.y
- - read_token_word: allow words like {array[ind]} to be valid redirection
- words for constructs like {x}<file
-
-redir.c
- - redir_varassign: bind_var_to_int already handles array assignments,
- so don't need to do anything more for things like {a[i]}<file
- - redir_varvalue: changes to allow references to {a[i]} when
- performing redirections using valid_array_reference and
- get_array_value. Adds functionality requested most recently by
- <unknown@vmw-les.eng.vmware.com>
-
-lib/readline/display.c
- - update_line: if the first difference between the old and new lines
- is completely before any invisible characters in the prompt, we
- should not adjust _rl_last_c_pos, since it's before any invisible
- characters. Fixed in two places
- - prompt_modechar: return a character indicating the editing mode:
- emacs (@), vi command (:), or vi insert (+)
- - _rl_reset_prompt: new function, just calls rl_expand_prompt. Will be
- inlined, placeholder for more changes
- - expand_prompt: if show-mode-in-prompt is enabled, add a character to
- the front of the prompt indicating the editing mode, adjusting the
- various variables as appropriate to keep track of the number of
- visible characters and number of screen positions
-
-lib/readline/bind.c
- - show-mode-in-prompt: new bindable boolean variable, shadowed by
- _rl_show_mode_in_prompt variable
- - hack_special_boolean_var: call _rl_reset_prompt when toggling or
- setting show-mode-in-prompt
-
-lib/readline/readline.c
- - readline_internal_setup: make sure the correct vi mode keymap is set
- before expanding the prompt string for the first time
-
-lib/readline/misc.c
- - rl_emacs_editing_mode: make sure to call _rl_reset_prompt if we're
- showing the editing mode in the prompt
-
-lib/readline/rlprivate.h
- - _rl_reset_prompt, _rl_show_mode_in_prompt: extern declarations
-
-lib/readline/vi_mode.c
- - rl_vi_insertion_mode: call _rl_reset_prompt
- - rl_vi_movement_mode: call _rl_reset_prompt. Finishes changes for
- showing mode in prompt string, originally requested by Miroslav
- Koskar <mkoskar@gmail.com> and most recently by Jordan Michael
- Ziegler <jziegler@bnl.gov>
-
-doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
- - document new show-mode-in-prompt variable, off by default
-
- 9/3
- ---
-
-jobs.c
- - set_childmax: new function, external mechanism for other parts of
- the shell to set js.c_childmax, the number of saved exited child
- statuses to remember
-jobs.h
- - set_childmax: extern declaration
-
-variables.c
- - CHILD_MAX: new special variable, with sv_childmax function to
- run when it changes. Setting CHILD_MAX to a value greater than
- zero but less than some maximum (currently 8192) sets the number of
- exited child statuses to remember. set_childmax (jobs.c) ensures
- that the number does not drop below the posix-mandated minimum
- (CHILD_MAX)
-
-doc/{bash.1,bashref.texi}
- - CHILD_MAX: document new meaning and action when variable is set
-
- 9/5
- ---
-redir.c
- - redir_varassign: call stupidly_hack_special_variables after
- assigning fd number to specified variable, so we can use constructs
- like {BASH_XTRACEFD}>foo. Suggested by Pierre Gaston
- <pierre.gaston@gmail.com>
-
- 9/8
- ---
-expr.c
- - readtok: invalidate previous contents of `curlval' before freeing
- and reallocating tokstr (which, chances are, will get the same
- pointer as before and render curlval inconsistent). Fixes other
- bug reported by Dan Douglas <ormaaj@gmail.com>
-
- 9/9
- ---
-lib/readline/complete.c
- - rl_username_completion_function: protect call to setpwent() with
- #ifdef (HAVE_GETPWENT)/#endif. Fixes bug reported by
- Gerd Hofmann <gerd.hofmann.nbg@googlemail.com>
-
-lib/readline/display.c
- - rl_message: second and subsequent calls to rl_message can result in
- local_prompt being overwritten with new values (e.g., from the
- successive calls displaying the incremental search string). Need
- to free before overwriting if it's not the same as the value saved
- in saved_local_prompt. Fixes memory leak reported by
- Wouter Vermaelen <vermaelen.wouter@gmail.com>
-
-lib/readline/{terminal.c,rlprivate.h}
- - move CUSTOM_REDISPLAY_FUNC and CUSTOM_INPUT_FUNC defines from
- terminal.c to rlprivate.h so other files can use them
-
-expr.c
- - expr_streval: if noeval is non-zero, just return 0 right away,
- short-circuiting evaluation completely. readtok will leave curtok
- set correctly without re-entering the evaluator at all. Rest of
- fix for bug reported by Dan Douglas <ormaaj@gmail.com>
-
- 9/11
- ----
-
-parse.y
- - parse_comsub: make sure the `reserved word ok in this context' flag
- is preserved after we read `do' followed by whitespace. Fixes bug
- reported by Benoit Vaugon <benoit.vaugon@gmail.com>
-
- 9/13
- ----
-configure.ac,config.h.in
- - enable-direxpand-default: new configure option, turns the `direxpand'
- shell option on by default
-
-bashline.c
- - dircomplete_expand, dircomplete_expand_relpath: initialize to 1 if
- DIRCOMPLETE_EXPAND_DEFAULT is defined and non-zero
-
-doc/bashref.texi
- - enable-direxpand-default: document new configure option
-
- 9/14
- ----
-shell.c
- - --protected: make option valid only when wordexp is compiled into
- the shell. Fix from Roman Rakus <rrakus@redhat.com>
-
-configure.ac
- - HP NonStop (*-nsk*): compile --without-bash-malloc. Change from
- Joachim Schmitz <jojo@schmitz-digital.de>
-
- 9/16
- ----
-subst.c,execute_cmd.c,lib/glob/sm_loop.c,lib/sh/shquote.c
- - minor code cleanups from Joachim Schmitz <jojo@schmitz-digital.de>
-
-lib/readline/colors.h
- - workaround for HP NonStop compiler issue with <stdbool.h> from
- Joachim Schmitz <jojo@schmitz-digital.de>
-
- 9/17
- ----
-builtins/printf.def
- - printf_builtin: handle localtime returning NULL, as can happen when
- encountering overflow. Bug report and initial fix from
- Eduardo A. Bustamante López <dualbus@gmail.com>
-
-doc/{bash.1,bashref.texi}
- - emphasize that brace expansion using character ranges ({a..c}) acts
- as if the C locale were in use. Prompted by message from
- Marcel Giannelia <info@skeena.net>
-
- 9/20
- ----
-lib/sh/wcsnwidth.c
- - wcsnwidth: new function, variant of wcwidth, returns the number of
- wide characters from a string that will be displayed to not exceed
- a specified max column position
-
- 9/21
- ----
-builtins/help.def
- - show_builtin_command_help: break code that displays the short-doc
- for each builtin in two columns into a new function: dispcolumn
- - wdispcolumn: multibyte-char version of dispcolumn; uses wide
- chars and printf "%ls" format. Fixes problem reported by
- Nguyá»n Thái Ngá»c Duy <pclouds@gmail.com>
-
- 9/22
- ----
-execute_cmd.c
- - execute_disk_command: before running the command-not-found hook,
- call kill_current_pipeline() to make sure we don't add processes
- to an existing pipeline or wait for processes erroneously
-
- 9/23
- ----
-lib/readline/input.c
- - rl_input_available_hook: new hook function, called from
- _rl_input_available (or _rl_input_queued) to return whether or not
- input is available wherever the input source is
-
-lib/readline/doc/rltech.texi
- - rl_input_available_hook: document
-
- 9/27
- ----
-lib/glob/sm_loop.c:
- - GMATCH: after one or more `*', an instance of ?(x) can match zero or
- 1 times (unlike ?, which has to match one character). The old code
- failed if it didn't match at least once. Fixes `a*?(x)' bug.
- - GMATCH: if we hit the end of the search string, but not the end of
- the pattern, and the rest of the pattern is something that can
- match the NUL at the end of the search string, we should successfully
- match. Fixes `a*!(x)' bug reported by <hans1worst@gmail.com>
-
- 10/2
- ----
-command.h
- - add c_lock member to coproc structure for future use to tell who is
- manipulating it
-
-execute_cmd.c
- - execute_coproc: block SIGCHLD while parent is forking coproc
- process and adding pid to sh_coproc struct to avoid race condition
- where child is reaped before the pid is assigned and the coproc is
- never marked as having died. Fixes race condition identified by
- Davide Baldini <baldiniebaldini@gmail.com>
- - add assignments to c_lock member of struct coproc in various
- functions that manipulate it; was used to identify race condition
- - coproc_pidchk: don't call coproc_dispose to avoid using malloc and
- other functions in a signal handler context
- - coproc_dispose: call BLOCK_SIGNAL/UNBLOCK_SIGNAL for SIGCHLD while
- manipulating the sh_coproc struct
-
- 10/6
- ----
-lib/readline/complete.c
- - rl_display_match_list: if printing completions horizontally, don't
- bother with spacing calculations if limit == 1, which means we are
- printing one completion per line no matter what. Fixes bug
- reported by David Kaasen <kaasen@nvg.ntnu.no>
-
- 10/7
- ----
-builtins/declare.def
- - declare_internal: add error checking for nameref attribute and
- variable assignments: self-references, attempts to make an array
- variable a nameref
-
-subst.c
- - parameter_brace_expand: handle parameter_brace_expand_word returning
- &expand_param_fatal or &expand_param_error and return the appropriate
- error value
- - parameter_brace_expand_word: if a nameref variable's value is not a
- valid identifier, return an error
- - param_expand: if a nameref variable's value is not a valid identifier,
- return an error
-
-test.c
- - unary_operator: add new -R variable, returns true if variable is set
- and has the nameref attribute. From ksh93
-
-builtins/test.def
- - add -R to description of conditional commands for help test
-
-doc/{bash.1,bashref.texi}
- - document new -R unary conditional operator
-
- 10/13
- -----
-trap.c
- - check_signals_and_traps: new function, convenience function for the
- rest of the shell to check for pending terminating and interrupt
- signals, and to check for and process any pending traps
- - any_signals_trapped: new function, returns non-zero if any signals
- are trapped and -1 if not
-
-trap.h
- - extern declaration for check_signals_and_traps
-
-bashline.c
- - bashline_reset: make sure we reset the event hook
- - bash_event_hook: call check_signals_and_traps instead of just
- checking for terminating signals so we can run pending traps and
- react to interrupts, and reset the event hook when we're done
-
-
- 10/14
- -----
-trap.c
- - trap_handler: if executing in a readline signal handler context,
- call bashline_set_event_hook to install bash_event_hook to process
- the signal (if bash cares about it)
-
-sig.c
- - sigint_sighandler: call bashline_set_event_hook to set the event
- hook if we're executing in a readline signal handler context
-
-lib/readline/input.c
- - rl_getc: call RL_CHECK_SIGNALS if read returns -1/EINTR and the caught
- signal is SIGINT or SIGQUIT rather than waiting until the next time
- around the loop
- - rl_getc: call rl_event_hook after calling RL_CHECK_SIGNALS to allow
- an application signal handler to set the event hook in its own
- signal handler (e.g., like bash trap_handler or sigint_sighandler)
-
-
-parse.y
- - yy_readline_get: don't set interrupt_immediately before we call
- readline(). Inspired by report from lanshun zhou
- <zls.sogou@gmail.com>
-
-input.c
- - getc_with_restart: add call to run_pending_traps after call to
- CHECK_TERMSIG
-
-lib/sh/zread.c
- - zread: call check_signals_and_traps if read() returns -1/EINTR
- instead of just ignoring the EINTR and deferring handling any
- signal that generated it
-
-builtins/mapfile.def
- - mapfile: don't set interrupt_immediately before calling zgetline()
- (which uses zread internally)
-
-builtins/read.def
- - read_builtin: don't set interrupt_immediately before calling zread
- (moved code around so that it was only being set right around calls
- to zread to avoid signal handler conflicts). Inspired by report
- from lanshun zhou <zls.sogou@gmail.com>
- - edit_line: don't set interrupt_immediately around call to readline()
- - include shmbutil.h
- - read_builtin: don't call read_mbchar unless is_basic(c) returns
- false for the character we just read
-
- 10/15
- -----
-sig.c
- - throw_to_top_level: if interrupt_state is non-zero, make sure that
- last_command_exit_value reflects 128+SIGINT if it's not already
- greater than 128
-
- 10/20
- -----
-builtins/wait.def
- - WAIT_RETURN: set wait_signal_received back to 0 for the potential
- next call to wait
-
-quit.h
- - CHECK_WAIT_INTR: macro to check whether trap_handler handled a
- signal and set wait_signal_received; longjmp to wait_intr_buf in
- that case
-
-jobs.c
- - wait_for, waitchld: call CHECK_WAIT_INTR at the same places we call
- CHECK_TERMSIG to check for terminating signals
- - wait_sigint_handler: don't longjmp out of the wait builtin unless
- interrupt_immediately is set; otherwise just SIGRETURN from the
- handler
- - wait_sigint_handler: if interrupt_immediately not set, but we are
- executing in the wait builtin and SIGINT is not trapped, treat it
- as a `normally received' SIGINT: restore the signal handler and
- send SIGINT to ourselves
- - waitchld: when in posix mode and running SIGCHLD traps, don't longjmp
- to wait_intr_buf (and let wait be interrupted) if we're running from
- a signal handler. Wait for CHECK_WAIT_INTR to do the longjmp.
- run_pending_traps will run the SIGCHLD trap later
-
-nojobs.c
- - reap_zombie_children, wait_for_single_pid, wait_for: call
- CHECK_WAIT_INTR where we call CHECK_TERMSIG
- - wait_sigint_handler: don't longjmp out of the wait builtin unless
- interrupt_immediately is set; otherwise just SIGRETURN from the
- handler
-
-trap.c
- - trap_handler: make sure wait_signal_received is set if the wait
- builtin is executing, and only longjmp if interrupt_immediately is
- set. This whole set of fixes was prompted by report from
- lanshun zhou <zls.sogou@gmail.com>
-
- 10/24
- -----
-lib/glob/glob.c
- - glob_filename: only check directory_name for globbing chars if
- it's of non-zero length
-
-lib/sh/strchrnul.c
- - new simpler implementation
-
-subst.c
- - command_substitute: call set_shellopts after turning off errexit
- in subshells so it's reflected in $SHELLOPTS
-
- 11/7
- ----
-builtins/evalstring.c
- - parse_and_execute: treat ERREXIT case like reader_loop does: set
- variable_context to 0 before longjmping back to top_level. Don't
- run the unwind-protect context to avoid side effects from popping
- function contexts. Part of fix for problem reported by Nikolai
- Kondrashov <nikolai.kondrashov@redhat.com>
-
-execute_cmd.c
- - execute_simple_command: call unlink_fifo_list only if this is the
- last element of a pipeline (or not in a pipeline), rather than for
- every child. Fixes difference in behavior between /dev/fd and
- FIFOs reported by Zev Weiss <zev@bewilderbeest.net>
- - execute_null_command: do the same thing in the parent branch after
- make_child
-
- 11/14
- -----
-subst.c
- - parameter_brace_expand: a variable is null if it's special ($@, $*),
- the expansion occurs within double quotes, and the expansion turns
- into a quoted null. Fixes debian bug 692447 reported by
- Matrosov Dmitriy <sgf.dma@gmail.com>
-
-jobs.c
- - run_sigchld_trap: make sure `running_trap' sentinel is set
- appropriately
- - waitchld: only run the sigchld trap if we're not in a signal
- handler, not running a trap, and executing the wait builtin.
- Otherwise, queue for later handling. We still run one instance
- of the trap handler per exited child. Bulk of fix for bug
- reported by Elliott Forney <idfah@cs.colostate.edu>
-
-trap.c
- - queue_sigchld_trap: set catch_flag so run_pending_traps notices,
- and set trapped_signal_received for completeness. Rest of fix
- for bug reported by Elliott Forney <idfah@cs.colostate.edu>
-
-lib/malloc/malloc.c
- - block_signals: renamed to _malloc_block_signals, made public
- - unblock_signals: renamed to _malloc_unblock_signals, made public
-
-lib/malloc/imalloc.h
- - extern declarations for _malloc_{un,}block_signals
-
-lib/malloc/table.c
- - mregister_alloc, mregister_free: block signals around table
- manipulation
-
- 11/15
- -----
-trap.c
- - run_pending_traps: set SIG_INPROGRESS flag around calls to
- run_sigchld_handler so other parts of the shell know that the
- SIGCHLD trap handler is executing
- - run_pending_traps: if we get a situation where we are looking at
- running a SIGCHLD trap but the trap string is IMPOSSIBLE_TRAP_HANDLER
- and the SIG_INPROGRESS flag is set, just skip it. This is possible
- if run_pending_traps is called from a SIGCHLD trap handler run by
- run_sigchld_trap
-
-doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
- - corrected description of the effect of `set history-size 0'. Report
- from Vesa-Matti J Kari <vmkari@cc.helsinki.fi>
-
-include/stdc.h
- - CPP_STRING: new define, replaces __STRING
-
-lib/malloc/{malloc.c,imalloc.h}
- - replace __STRING with CPP_STRING
-
- 11/16
- -----
-lib/readline/bind.c
- - sv_histsize: if argument evaluates to a value < 0, unstifle the
- history
-
- 11/22
- -----
-redir.c
- - do_redirection_internal: if we have REDIR_VARASSIGN set in the
- redirection flags and we set up `redirector' using fcntl or dup2,
- don't add a redirect to make sure it stays open. Let the
- script programmer manage the file handle. Fixes bug reported by
- Sam Liddicott <sam@liddicott.com>
-
- 11/24
- -----
-jobs.c
- - wait_for_any_job: new function, waits for an unspecified background
- job to exit and returns its exit status. Returns -1 on no background
- jobs or no children or other errors. Calls wait_for with new
- sentinel value ANY_PID
- - wait_for: changes to handle argument of ANY_PID: don't look up or
- try to modify the child struct, only go through the wait loop once.
- Return -1 if waitpid returns no children
-
-jobs.h
- - ANY_PID: new define
-
-builtins/wait.def
- - new option: -n. Means to wait for the next job and return its exit
- status. Returns 127 if there are no background jobs (or no
- children). Feature most recently requested by Elliott Forney
- <idfah@cs.colostate.edu>
-
-doc/{bash.1,bashref.texi}
- - document new `wait -n' option
-
-execute_cmd.c
- - execute_command_internal: save make_command_string () result in a
- temp variable before calling savestring() on it; avoids evaluating
- make_command_string() result twice. Fix from John E. Malmberg
- <wb8tyw@qsl.net>
-
- 11/28
- -----
-
-builtins/declare.def
- - declare_internal: if an array variable is declared using `declare -a'
- or `declare -A', but not assigned a value, set the `invisible'
- attribute so the variable does not show up as set. Fix for bug
- about variable initialization reported by Tim Friske <me@timfriske.com>
-
-builtins/{mapfile,read}.def
- - after calling find_or_make_array_variable, make sure the invisible
- flag is turned off, in case the variable was declared previously
- using `declare -a' or `declare -A'. Side effect of above change to
- declare_internal
-
-subst.c
- - shell_expand_word_list: handle the W_ASSNGLOBAL flag and put -g into
- the list of options passed to make_internal_declare as appropriate.
- Fix for bug reported by Tim Friske <me@timfriske.com>
-
- 11/30
- -----
-test.c
- - unary_op: make sure -v and -n check that the variable is not marked
- as invisible before calling var_isset. Fix for bug reported by Tim
- Friske <me@timfriske.com>
-
- 12/2
- ----
-subst.c
- - process_substitute: turn off the `expanding_redir' flag, which
- controls whether or not variables.c:find_variable_internal uses the
- temporary environment to find variables. We want to use the
- temp environment, since we don't have to worry about order of
- evaluation in a subshell. Fixes bug reported by Andrey Borzenkov
- <arvidjaar@gmail.com>
-
- 12/4
- ----
-lib/glob/glob.c
- - glob_filename: changes to avoid null filenames and multiple entries
- returned for patterns like **/** (globstar enabled). Fixes bug
- reported by Ulf Magnusson <ulfalizer@gmail.com>
-
- 12/10
- -----
-lib/glob/glob.c
- - glob_filename: finish up a series of changes to make globstar-style
- globbing more efficient, avoid more duplicate filenames, and be more
- compatible with other shells that implement it
- o collapse a sequence of **/**/** to one **
- o note when the directory name is all ** or ends in ** so we
- can treat it specially when the filename is **
- All inspired by report from Andrey Borzenkov <arvidjaar@gmail.com>
-
-lib/sh/zread.c
- - zreadn: new function, like zread, but takes an additional argument
- saying how many bytes to read into the local buffer. Can be used to
- implement `read -N' without so many one-byte calls to zreadc. Code
- from Mike Frysinger <vapier@gentoo.org>
-
- 12/12
- -----
-lib/glob/sm_loop.c
- - PATSCAN (glob_patscan): if passed string already points to end of
- pattern, return NULL immediately. Fixes problem with
- extglob_skipname reported by Raphaël Droz <raphael.droz@gmail.com>
-
- 12/13
- -----
-execute_cmd.c
- - execute_coproc: handle the command's exit status being inverted
- (an oversight). Fixes bug reported by DJ Mills
- <danielmills1@gmail.com> and Andreas Schwab <schwab@linux-m68k.org>
-
- 12/14
- -----
-lib/readline/readline.c
- - bind_arrow_keys_internal: add MINGW key bindings for Home, End,
- Delete, and Insert keys. Fix from Pierre Muller
- <pierre.muller@ics-cnrs.unistra.fr>
-
-builtins/printf.def
- - printf_builtin: '%()T' conversion: if there is no argument supplied,
- behave as if -1 had been supplied (current time). ksh93-like feature
- suggested by Clark Wang <dearvoid@gmail.com>
-
-doc/{bash.1,bashref.texi}
- - document new printf %()T default argument behavior
-
- 12/15
- -----
-lib/readline/display.c
- - displaying_prompt_first_line: new variable, indicates whether or
- not the first line of output is displaying the prompt. Always true
- in normal mode, sometimes false in horizontal scrolling mode
- - rl_redisplay: set displaying_prompt_first_line to true unless we
- are in horizontal mode; set to false in horizontal mode if the left
- margin of the displayed line is greater than the end of the prompt
- string
- - rl_redisplay: when in horizontal scroll mode, don't adjust
- _rl_last_c_pos by the wrap offset unless the line is displaying
- a prompt containing invisible chars
- - update line: don't adjust _rl_last_c_pos by the wrap offset unless
- the line is displaying a prompt containing invisible chars
- - update_line: if shrinking the line by reducing the number of
- displayed characters, but we have already moved the cursor to the
- beginning of the line where the first difference starts, don't
- try to delete characters
-
-builtins/read.def
- - unbuffered_read: set to 2 if invoked as `read -N'
- - if unbuffered_read is set to 2, compute the number of chars we
- need to read and read that many with zreadn. Posix mode still
- uses zreadintr. Code from Mike Frysinger <vapier@gentoo.org>
-
-doc/{bash.1,bashref.texi}
- - read: make it clear that if read times out, it saves any input
- read to that point into the variable arguments. Report from
- Fiedler Roman <Roman.Fiedler@ait.ac.at>
-
-subst.c
- - command_substitute: change direct assignment of exit_immediately_on_error
- to use change_flag ('e', FLAG_OFF) instead
-
-flags.c
- - use errexit_flag as the variable modified by changes to the -e
- option, reflect those changes to exit_immediately_on_error
-
-execute_cmd.c
- - execute_builtin: new global variable, builtin_ignoring_errexit, set
- to 0 by default and set to 1 if eval/source/command executing in a
- context where -e should be ignored
- - execute_builtin: set exit_immediately_on_error to errextit_flag
- after executing eval/source/command in a context where -e should
- be ignored
-
-flags.c
- - if builtin_ignoring_errexit is set, changes to errexit_flag are
- not reflected in the setting of exit_immediately_on_error. Fixes
- bug reported by Robert Schiele <rschiele@gmail.com>
-
- 12/23
- -----
-include/posixjmp.h
- - setjmp_nosigs: new define, call setjmp in such a way that it will
- not manipulate the signal mask
-
-{expr,test,trap}.c
- - setjmp_nosigs: call instead of setjmp; don't need to manipulate
- signal mask
-
-builtins/read.def
- - read_builtin: setjmp_nosigs: call instead of setjmp; don't need
- to manipulate signal mask
-
-builtins/evalstring.c:
- - parse_and_execute: setjmp_nosigs: call instead of setjmp; don't need
- to manipulate signal mask
- - parse_string: setjmp_nosigs: call instead of setjmp; don't need
- to manipulate signal mask
- - parse_and_execute: save and restore the signal mask if we get a
- longjmp that doesn't cause us to return or exit (case DISCARD)
-
- 12/24
- -----
-general.c
- - bash_tilde_expand: only set interrupt_immediately if there are no
- signals trapped; we want to jump to top level if interrupted but
- not run any trap commands
-
- 12/25
- -----
-jobs.c
- - run_sigchld_trap: no longer set interrupt_immediately before calling
- parse_and_execute, even if this is no longer run in a signal handler
- context
-
-input.c
- - getc_with_restart: add call to QUIT instead of CHECK_TERMSIG
-
-parse.y
- - yy_stream_get: now that getc_with_restart calls QUIT, don't need to
- set interrupt_immediately (already had call to run_pending_traps)
-
-execute_cmd.c
- - execute_subshell_builtin_or_function,execute_function,execute_in_subshell:
- setjmp_nosigs: call instead of setjmp when saving return_catch; don't
- need to manipulate signal mask
- - execute_subshell_builtin_or_function,execute_in_subshell:
- setjmp_nosigs: call instead of setjmp where appropriate when saving
- top_level; don't need to manipulate signal mask if we're going to
- exit right away
-
-subst.c
- - command_substitute: setjmp_nosigs: call instead of setjmp when saving
- return_catch; don't need to manipulate signal mask
- - command_substitute: setjmp_nosigs: call instead of setjmp where
- appropriate when saving top_level; don't need to manipulate signal
- mask if we're going to exit right away
-
-trap.c
- - run_exit_trap: setjmp_nosigs: call instead of setjmp when saving
- return_catch; don't need to manipulate signal mask
- - run_exit_trap: setjmp_nosigs: call instead of setjmp where
- appropriate when saving top_level; don't need to manipulate signal
- mask if we're going to exit right away
- - _run_trap_internal: setjmp_nosigs: call instead of setjmp when saving
- return_catch; don't need to manipulate signal mask
-
-builtins/evalfile.c
- - _evalfile: setjmp_nosigs: call instead of setjmp when saving
- return_catch; don't need to manipulate signal mask
-
-builtins/evalstring.c
- - evalstring: setjmp_nosigs: call instead of setjmp when saving
- return_catch; don't need to manipulate signal mask
-
-shell.c
- - main: setjmp_nosigs: call instead of setjmp where appropriate when
- saving top_level; don't need to manipulate signal mask if we're
- going to exit right away
- - run_one_command: setjmp_nosigs: call instead of setjmp where
- appropriate when saving top_level; don't need to manipulate signal
- mask if we're going to exit right away
- - run_wordexp: setjmp_nosigs: call instead of setjmp where
- appropriate when saving top_level; don't need to manipulate signal
- mask if we're going to exit right away
-
-eval.c
- - reader_loop: save and restore the signal mask if we get a longjmp
- that doesn't cause us to return or exit (case DISCARD)
-
- 12/26
- -----
-parse.y
- - shell_input_line_{index,size,len}: now of type size_t; in some cases
- the unsigned property makes a difference
- - STRING_SAVER: saved_line_{size,index} now of type size_t
- - shell_getc: don't allow shell_input_line to grow larger than SIZE_MAX;
- lines longer than that are truncated until read sees a newline;
- addresses theoretical buffer overflow described by Paul Eggert
- <eggert@cs.ucla.edu>
- - set_line_mbstate: size_t changes like shell_getc
- - shell_getc: if shell_input_line is larger than 32K, free it and
- start over to avoid large memory allocations sticking around
-
-variables.c
- - bind_global_variable: new function, binds value to a variable in
- the global shell_variables table
-
-variables.h
- - bind_global_variable: new extern declaration
-
-builtins/declare.def
- - declare_internal: if -g given with name=value, but variable is not
- found in the global variable table, make sure to call
- bind_global_variable so the variable is created and modified at
- global scope. Fixes a bug where declare -g x=y could modify `x'
- at a previous function scope
-
-command.h
- - W_ASSIGNARRAY: new word flag, compound indexed array assignment
-
-subst.h
- - ASS_MKGLOBAL: new assignment flag, forcing global assignment even in
- a function context, used by declare -g
-
-execute_cmd.c
- - fix_assignment_words: set W_ASSIGNARRAY flag if -a option given to
- declaration builtin
-
-subst.c
- - do_assignment_internal: explicitly handle case where we are
- executing in a function and we want to create a global array or
- assoc variable
- - shell_expand_word_list: call make_internal_declare if -a option
- given to declaration builtin (W_ASSIGNARRAY); handle -g option with
- it (W_ASSNGLOBAL). Fixes inconsistency noticed by Vicente Couce
- Diaz <vituko@gmail.com>, where declare -ag foo=(bar) could modify
- array variable foo at previous function scope, not global scope
-
- 12/27
- -----
-bashline.c
- - Minix needs the third argument to tputs to be a void funtion taking
- an int argument, not an int-returning function. Fix from
- John E. Malmberg <wb8tyw@qsl.net> as part of VMS bash port
-
- 12/29
- -----
-configure.ac,version.c,patchlevel.h
- - bash-4.3-devel: new version, new shell compatibility level (43)
-
-subst.c
- - parameter_brace_patsub: put the bash-4.2 code back in from the
- change of 3/3 that runs the replacement string through quote
- removal, make it dependent on shell_compatibility_level <= 42
-
-builtins/shopt.def
- - compat42: new shopt option
- - set_compatibility_level: change logic to set and unset various
- compat variables and shell_compatibility_level
-
-COMPAT
- - new documentation for bash-4.3 compatibility changes
-
-doc/{bash.1,bashref.texi}
- - compat42: document new shopt option
-
-builtins/shopt.def
- - set_compatibility_opts: new function, sets the various shopt
- compat variables based on the value of shell_compatibility_level
-
-builtins/common.h
- - set_compatibility_opts: new extern declaration
-
-variables.c
- - BASH_COMPAT: new special variable; sets the shell compatibility
- level. Accepts values in decimal (4.2) or integer (42) form;
- Unsetting variable, setting it to empty string, or setting it to
- out-of-range value sets the shell's compatibility level to the
- default for the current version. Valid values are 3.1/31 through
- the current version
- - sv_shcompat: new function implementing logic for BASH_COMPAT
-
-variables.h
- - sv_shcompat: new extern declaration
-
-doc/{bash.1,bashref.texi}
- - BASH_COMPAT: description of new variable
-
-lib/readline/complete.c
- - _rl_colored_stats: default back to 0 for 4.3 release branch
-
- 1/5/2013
- --------
-quit.h
- - remove spurious call to itrace in CHECK_WAIT_INTR
-
-bashline.c
- - bash_event_hook: if we're going to jump to top_level, make sure we
- clean up after readline() by calling rl_cleanup_after_signal().
- Fixes bug reported against devel branch by Raphaël Droz
- <raphael.droz@gmail.com>
- - bash_event_hook: reset the event hook before checking for signals
- or traps in case we longjmp
-
-doc/{bash.1,bashref.texi}
- - small additions to the set -e section to make it more clear that
- contexts where -e is ignored extend to compound commands as well
- as shell functions
-
-lib/readline/readline.h
- - rl_signal_event_hook: new extern declaration
-
-lib/readline/input.c
- - rl_signal_event_hook: new variable, hook function to call when a
- function (currently just read(2)) is interrupted by a signal and
- not restarted
- - rl_getc: call rl_signal_event_hook instead of rl_event_hook
-
-lib/readline/doc/rltech.texi
- - rl_signal_event_hook: document new function
-
-bashline.c
- - changes to set rl_signal_event_hook instead of rl_event_hook
-
-lib/readline/readline.h
- - change readline version numbers to 6.3
-
- 1/6
- ---
-doc/{bash.1,bashref.texi}
- - a couple of changes to the descriptions of the ERR trap and its
- effects based on a message from Rob Nagler <nagler@bivio.biz>
-
- 1/9
- ---
-expr.c
- - expassign: invalidate curlval before freeing and NULLing tokstr to
- avoid aliasing issues. Fixes bug reported by Eduardo A. Bustamante
- López<dualbus@gmail.com> and Dan Douglas <ormaaj@gmail.com>
-
-braces.c
- - array_concat: don't be so aggressive in trying to short-circuit. We
- can only short-circuit if we have a single-element array where the
- element is an empty string (array[0] == "" array[1] = 0x0). Existing
- practice requires us to replicate arrays and prefix or append empty
- strings. Fixes bug reported by Eduardo A. Bustamante López
- <dualbus@gmail.com>
-
- 1/11
- ----
-execute_cmd.c
- - execute_builtin: since mapfile uses evalstring() to run its callbacks
- internally, just like eval, so it needs to handle the case where the
- temp environment given to mapfile persists throughout the entire
- set of callback commands. This might be a problem with trap also, but
- trap isn't run in the same way. Fixes bug reported by Dan Douglas
- <ormaaj@gmail.com>
-
- 1/13
- ----
-redir.c
- - redirection_error: before expanding the redirection word (if
- expandable_redirection_filename returns true), disable command
- substitution during expansion. Fixes bug reported by Dan Douglas
- <ormaaj@gmail.com>
-
-subst.c
- - expand_word_internal: case '\\': if the next character is an IFS
- character, and the expansion occurs within double quotes, and the
- character is not one for which backslash retains its meaning, add
- the (escaped) '\' and the (escaped) character. Fixes bug reported
- by Dan Douglas <ormaaj@gmail.com>
-
- 1/15
- ----
-builtins/cd.def
- - cd_builtin: make sure call to internal_getopt handles -e option.
- Fixes bug reported by <mashimiao.fnst@cn.fujitsu.com>
-
- 1/17
- ----
-subst.c
- - expand_word_list_internal: make sure tempenv_assign_error is
- initialized to 0
-
-execute_cmd.c
- - execute_simple_command: make sure tempenv_assign_error is reset to 0
- after it's tested to see if an error should force the shell to exit.
- Fixes problem where a the failure of a tempenv assignment preceding
- a non-special builtin `sticks' and causes the next special builtin
- to exit the shell. From a discussion on bug-bash started by
- douxin <wq-doux@cn.fujitsu.com>
-
- 1/20
- ----
-subst.c
- - parameter_brace_expand_rhs: call stupidly_hack_special_variables
- after assigning with ${param[:]=word} even if IFS is changing.
- Suggested by Dan Douglas <ormaaj@gmail.com> [TENTATIVE, needs work
- on IFS side effects]
-
-command.h
- - W_GLOBEXP (which was unused) is now W_SPLITSPACE (which isn't used
- yet)
-
-{execute_cmd,subst,variables}.c
- - removed all code that mentioned W_GLOBEXP
- - removed mention of gnu_argv_flags and code that set it
-
- 1/22
- ----
-subst.c
- - param_expand: set W_SPLITSPACE if we expand (unquoted) $* and
- IFS is unset or null so we can be sure to split this on spaces
- no matter what happens with IFS later
- - expand_word_internal: note that param_expand returns W_SPLITSPACE
- in the returned word flags and keep track of that state with
- `split_on_spaces'
-
- 1/23
- ----
-subst.c
- - expand_word_internal: if split_on_spaces is non-zero, make sure
- we split `istring' on spaces and return the resultant word. The
- previous expansions should have quoted spaces in the positional
- parameters where necessary. Suggested by Dan Douglas
- <ormaaj@gmail.com>
-
-execute_cmd.c
- - execute_command_internal: make sure any subshell forked to run a
- group command or user subshell at the end of a pipeline runs any
- EXIT trap it sets. Fixes debian bash bug 698411
- http://bugs.debian.org/cgi-big/bugreport.cgi?bug=698411
-
-subst.c
- - shell_expand_word_list: fix code that creates args for and calls
- make_internal_declare to avoid calling it twice (missing `else'
- in 12/26 change)
- - do_assignment_internal: fix code from 12/26 change to fix problem
- where an existing assoc variable could be converted to an array
- without checking `mkassoc'
-
- 1/24
- ----
-builtins/evalfile.c
- - _evalfile: add missing `close (fd)' calls before returning to
- avoid fd leaks. Bug and fix from Roman Rakus <rrakus@redhat.com>
-
- 1/25
- ----
-builtins/read.def
- - read_builtin: don't try to play tricks with the top of the unwind-
- protect stack after read gets a SIGALRM; save input_string to new
- memory, run the stack, then restore input_string and assign the
- variables. Part of fix for bug reported by konsolebox
- <konsolebox@gmail.com>; the rest of the fix is with the changes in
- trap and signal handling and doing away with interrupt_immediately
-
- 1/26
- ----
-redir.c
- - redirection_expand, write_here_string, write_here_document: before
- calling any of the word expansion functions, after setting
- expanding_redir to 1 (which bypasses the temp environment in the
- variable lookup functions), call sv_ifs to reset the cached IFS-
- related variables set by subst.c:setifs(). This ensures that
- redirections will not get any IFS values that are set in the
- temporary environment, as Posix specifies. Then, after the word
- expansions, after resetting expanding_redir to 0, call sv_ifs
- again to make sure the cached IFS values are set from any
- assignments in the temporary environment. We force executing_builtin
- to 1 to `fool' the variable lookup functions into using any temp
- environment, then reset it to its old value after sv_ifs returns.
- This is what allows read() to use the (cached) IFS variables set
- in the temp environment. Fixes inconsistency reported by Dan Douglas
- <ormaaj@gmail.com>
-
- 1/29
- ----
-lib/readline/display.c
- - update_line: fix off-by-one error when updating vis_lbreaks array
- in a multibyte locale that occurs when moving multibyte chars from
- one line down to another. Bug report and fix from Egmont
- Koblinger <egmont@gmail.com>
-
- 1/30
- ----
-configure.ac
- - changed version to 4.3-alpha
-
-redir.c
- - redir_open: handle open returning -1/EINTR, which seems to happen
- a lot with FIFOs and SIGCHLD, and call QUIT to handle other
- signals that can interrupt open(2). Bug report and initial fix
- from Mike Frysinger <vapier@gentoo.org>
-
- 1/31
- ----
-subst.c
- - parameter_brace_expand: make sure to propagate the PF_ASSIGNRHS flag
- to parameter_brace_expand_word
- - parameter_brace_expand_word: make sure that if the PF_ASSIGNRHS flag
- is set and we are expanding ${a[@]} or ${a[*]} we set quoted to
- include Q_DOUBLE_QUOTES before calling array_value_internal, mirroring
- what we do for $@ and $*. Fixes inconsistency reported by Dan
- Douglas <ormaaj@gmail.com>
-
-configure.ac
- - use AC_CHECK_TOOL instead of AC_CHECK_PROG to check for ar, since it
- will find $host-prefixed versions of utilities. Report and fix from
- Mike Frysinger <vapier@gentoo.org>
-
-builtins/setattr.def
- - set_var_attribute: check whether bind_variable (called when the
- variable whose attributes are being modified is found in the temp
- environment) just modified a read-only global variable, and don't
- bother marking the temporary variable for propagation if so. The
- propagation is superfluous and will result in a strange error
- message
-
- 2/2
- ---
-variables.c
- - initialize_shell_variables: don't try to import function definitions
- with invalid names from the environment if already in posix mode,
- but create them as (invisible) exported variables so they pass
- through the environment. Print an error message so user knows
- what's wrong. Fixes bug reported by Tomas Trnka <ttrnka@mail.muni.cz>
-
- 2/9
- ---
-
-builtins/read.def
- - sigalrm_seen, alrmbuf: now global so the rest of the shell (trap.c)
- can use them
- - sigalrm: just sets flag, no longer longjmps to alrmbuf; problem was
- longjmp without manipulating signal mask, leaving SIGALRM blocked
-
-quit.h
- - move CHECK_ALRM macro here from builtins/read.def so trap.c:
- check_signals() can call it
-
-trap.c
- - check_signals: add call to CHECK_ALRM before QUIT
- - check_signals_and_traps: call check_signals() instead of including
- CHECK_ALRM and QUIT inline. Integrating check for read builtin's
- SIGALRM (where zread call to check_signals_and_traps can see it)
- fixes problem reported by Mike Frysinger <vapier@gentoo.org>
-
- 2/12
- ----
-lib/glob/xmbsrtowcs.c
- - xdupmbstowcs2: fixed but where end of string was not handled
- correctly, causing loop to go past end of string in a bunch of cases.
- Fixes bug reported by "Dashing" <dashing@hushmail.com>
-
-
- 2/13
- ----
-builtins/pushd.def
- - popd_builtin: treat any argument that isn't -n or of the form
- [-+][[:digit:]]* as an error. Fixes problem reported by Bruce
- Korb <bruce.korb@gmail.com>
-
- 2/14
- ----
-configure.ac
- - add check for sig_atomic_t; already a placeholder for it in
- config.h.in
-
- 2/15
- ----
-subst.c
- - do_compound_assignment: don't call assign_compound_array_list with
- a NULL variable in case make_local_xxx_variable returns NULL
- (it will if you try to shadow a readonly or noassign variable).
- Fixes bug reported by Richard Tollerton <rich.tollerton@ni.com>
-
- 2/16
- ----
-variables.c
- - make_local_variable: print error messager if an attempt is made to
- create a local variable shadowing a `noassign' variable. Previously
- we just silently refused to do it
-
-trap.[ch]
- - get_original_signal: now global so rest of the shell can use it
-
-sig.c
- - initialize_shell_signals: install a signal handler for SIGTERM
- that does nothing except set a sigterm_received flag instead of
- ignoring it with SIG_IGN, as long as SIGTERM is not ignored when
- the shell is started. Use get_original_signal early to get the
- original handler, since we will do that later anyway
- - set_signal_handler: if installing sigterm_sighandler as the SIGTERM
- handler, make sure to add SA_RESTART flag to make it as close to
- SIG_IGN as possible
-
-sig.h
- - sigterm_sighandler: new extern declaration
-
-quit.h
- - RESET_SIGTERM: set sigterm_receved to 0
- - CHECK_SIGTERM: check sigterm_received; if it's non-zero, treat it
- as a fatal signal and call termsig_handler to exit the shell
-
-jobs.c
- - make_child: call RESET_SIGTERM just before fork() so we can detect
- if the child process received a SIGTERM before it's able to change
- the signal handler back to what it was when the shell started
- (presumably SIG_DFL). Only has effect if the shell installed
- sigterm_sighandler for SIGTERM, interactive shells that were not
- started with SIG_IGN as the SIGTERM handler
- - make_child: call RESET_SIGTERM in the parent after fork() so the
- rest of the shell won't react to it
-
-execute_cmd.c
- - execute_simple_command: call CHECK_SIGTERM after make_child in child
- to catch SIGTERM received after fork() and before restoring old
- signal handlers
- - execute_disk_command: call CHECK_SIGTERM after make_child in child
- process after restoring old signal handlers and again just before
- calling shell_execve. Fixes race condition observed by
- Padraig Brady <p@draigbrady.com> when testing with his `timeout'
- program
-
-lib/readline/display.c
- - open_some_spaces: new function, subset of insert_some_chars that just
- opens up a specified number of spaces to be overwritten
- - insert_some_spaces: now just calls to open_some_spaces followed by
- _rl_output_some_chars
- - update_line: use col_temp instead of recalculating it using
- _rl_col_width in the case where we use more columns with fewer bytes
- - update_line: use open_some_spaces and then output the right number
- of chars instead of trying to print new characters then overwrite
- existing characters in two separate calls. This includes removing
- some dodgy code and making things simpler. Fix from Egmont
- Koblinger <egmont@gmail.com>
- - use new variable `bytes_to_insert' instead of overloading temp in
- some code blocks (nls - nfd, bytes that comprise the characters
- different in the new line from the old)
-
- 2/18
- ----
-redir.c
- - do_redirection_internal: add undoable redirection for the implicit
- close performed by the <&n- and >&n- redirections. Fixes bug
- reported by Stephane Chazelas <stephane.chazelas@gmail.com>
-
- 2/19
- ----
-sig.c
- - termsig_handler: an interactive shell killed by SIGHUP and keeping
- command history will try to save the shell history before exiting.
- This is an attempt to preserve the save-history-when-the-terminal-
- window-is-closed behavior
-
- 2/21
- ----
-braces.c
- - brace_expand: if a sequence expansion fails (e.g. because the
- integers overflow), treat that expansion as a simple string, including
- the braces, and try to process any remainder of the string. The
- remainder may include brace expansions. Derived from SuSE bug
- 804551 example (https://bugzilla.novell.com/show_bug.cgi?id=804551)
-
- 2/23
- ----
-{quit,sig}.h,sig.c
- - sigterm_received declaration now in sig.h; type is sig_atomic_t
- - sigwinch_received type now sig_atomic_t
- - sig.h includes bashtypes.h and <signal.h> if SIG_DFL not defined
- (same logic as trap.h) to pick up sig_atomic_t
+++ /dev/null
-Starting bash with the `--posix' command-line option or executing
-`set -o posix' while bash is running will cause bash to conform more
-closely to the Posix.2 standard by changing the behavior to match that
-specified by Posix.2 in areas where the bash default differs.
-
-The following list is what's changed when `posix mode' is in effect:
-
-1. When a command in the hash table no longer exists, bash will re-search
- $PATH to find the new location. This is also available with
- `shopt -s checkhash'.
-
-2. The >& redirection does not redirect stdout and stderr.
-
-3. The message printed by the job control code and builtins when a job
- exits with a non-zero status is `Done(status)'.
-
-4. Reserved words may not be aliased.
-
-5. The Posix.2 PS1 and PS2 expansions of `!' -> history number and
- `!!' -> `!' are enabled, and parameter expansion is performed on
- the value regardless of the setting of the `promptvars' option.
-
-6. Interactive comments are enabled by default. (Note that bash has
- them on by default anyway.)
-
-7. The Posix.2 startup files are executed ($ENV) rather than the normal
- bash files.
-
-8. Tilde expansion is only performed on assignments preceding a command
- name, rather than on all assignment statements on the line.
-
-9. The default history file is ~/.sh_history (default value of $HISTFILE).
-
-10. The output of `kill -l' prints all the signal names on a single line,
- separated by spaces.
-
-11. Non-interactive shells exit if `file' in `. file' is not found.
-
-12. Redirection operators do not perform pathname expansion on the word
- in the redirection unless the shell is interactive
-
-13. Function names must be valid shell identifiers. That is, they may not
- contain characters other than letters, digits, and underscores, and
- may not start with a digit. Declaring a function with an illegal name
- causes a fatal syntax error in non-interactive shells.
-
-14. Posix.2 `special' builtins are found before shell functions during command
- lookup.
-
-15. If a Posix.2 special builtin returns an error status, a non-interactive
- shell exits. The fatal errors are those listed in the POSIX.2 standard,
- and include things like passing incorrect options, redirection errors,
- variable assignment errors for assignments preceding the command name,
- and so on.
-
-16. The environment passed to executed commands is not sorted. Neither is
- the output of `set'. This is not strictly Posix.2 behavior, but sh
- does it this way. Ksh does not. It's not necessary to sort the
- environment; no program should rely on it being sorted.
-
-17. If the `cd' builtin finds a directory to change to using $CDPATH, the
- value it assigns to $PWD does not contain any symbolic links, as if
- `cd -P' had been executed.
-
-18. A non-interactive shell exits with an error status if a variable
- assignment error occurs when no command name follows the assignment
- statements. A variable assignment error occurs, for example, when
- trying to assign a value to a read-only variable.
-
-19. A non-interactive shell exits with an error status if the iteration
- variable in a for statement or the selection variable in a select
- statement is a read-only variable.
-
-20. Process substitution is not available.
-
-21. Assignment statements preceding POSIX.2 `special' builtins persist in
- the shell environment after the builtin completes.
-
-There is other Posix.2 behavior that bash does not implement. Specifically:
-
-1. Assignment statements affect the execution environment of all builtins,
- not just special ones.
+++ /dev/null
-This file is set.def, from which is created set.c.
-It implements the "set" and "unset" builtins in Bash.
-
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
-
-This file is part of GNU Bash, the Bourne Again SHell.
-
-Bash is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 1, or (at your option) any later
-version.
-
-Bash is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License along
-with Bash; see the file COPYING. If not, write to the Free Software
-Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-$PRODUCES set.c
-
-#include <stdio.h>
-#include "../shell.h"
-#include "../flags.h"
-
-#include "bashgetopt.h"
-
-extern int interactive;
-extern int noclobber, posixly_correct;
-#if defined (READLINE)
-extern int rl_editing_mode, no_line_editing;
-#endif /* READLINE */
-
-$BUILTIN set
-$FUNCTION set_builtin
-$SHORT_DOC set [--abefhkmnptuvxldBCHP] [-o option] [arg ...]
- -a Mark variables which are modified or created for export.
- -b Notify of job termination immediately.
- -e Exit immediately if a command exits with a non-zero status.
- -f Disable file name generation (globbing).
- -h Locate and remember function commands as functions are
- defined. Function commands are normally looked up when
- the function is executed.
- -i Force the shell to be an "interactive" one. Interactive shells
- always read `~/.bashrc' on startup.
- -k All keyword arguments are placed in the environment for a
- command, not just those that precede the command name.
- -m Job control is enabled.
- -n Read commands but do not execute them.
- -o option-name
- Set the variable corresponding to option-name:
- allexport same as -a
- braceexpand same as -B
-#if defined (READLINE)
- emacs use an emacs-style line editing interface
-#endif /* READLINE */
- errexit same as -e
- histexpand same as -H
- ignoreeof the shell will not exit upon reading EOF
- interactive-comments
- allow comments to appear in interactive commands
- monitor same as -m
- noclobber disallow redirection to existing files
- noexec same as -n
- noglob same as -f
- nohash same as -d
- notify save as -b
- nounset same as -u
- physical same as -P
- posix change the behavior of bash where the default
- operation differs from the 1003.2 standard to
- match the standard
- privileged same as -p
- verbose same as -v
-#if defined (READLINE)
- vi use a vi-style line editing interface
-#endif /* READLINE */
- xtrace same as -x
- -p Turned on whenever the real and effective user ids do not match.
- Disables processing of the $ENV file and importing of shell
- functions. Turning this option off causes the effective uid and
- gid to be set to the real uid and gid.
- -t Exit after reading and executing one command.
- -u Treat unset variables as an error when substituting.
- -v Print shell input lines as they are read.
- -x Print commands and their arguments as they are executed.
- -l Save and restore the binding of the NAME in a FOR command.
- -d Disable the hashing of commands that are looked up for execution.
- Normally, commands are remembered in a hash table, and once
- found, do not have to be looked up again.
-#if defined (BRACE_EXPANSION)
- -B the shell will perform brace expansion
-#endif /* BRACE_EXPANSION */
-#if defined (BANG_HISTORY)
- -H Enable ! style history substitution. This flag is on
- by default.
-#endif /* BANG_HISTORY */
- -C If set, disallow existing regular files to be overwritten
- by redirection of output.
- -P If set, do not follow symbolic links when executing commands
- such as cd which change the current directory.
-
-Using + rather than - causes these flags to be turned off. The
-flags can also be used upon invocation of the shell. The current
-set of flags may be found in $-. The remaining n ARGs are positional
-parameters and are assigned, in order, to $1, $2, .. $n. If no
-ARGs are given, all shell variables are printed.
-$END
-
-/* An a-list used to match long options for set -o to the corresponding
- option letter. */
-struct {
- char *name;
- int letter;
-} o_options[] = {
- { "allexport", 'a' },
-#if defined (BRACE_EXPANSION)
- { "braceexpand",'B' },
-#endif
- { "errexit", 'e' },
- { "histexpand", 'H' },
- { "monitor", 'm' },
- { "noexec", 'n' },
- { "noglob", 'f' },
- { "nohash", 'd' },
-#if defined (JOB_CONTROL)
- { "notify", 'b' },
-#endif /* JOB_CONTROL */
- {"nounset", 'u' },
- {"physical", 'P' },
- {"privileged", 'p' },
- {"verbose", 'v' },
- {"xtrace", 'x' },
- {(char *)NULL, 0},
-};
-
-#define MINUS_O_FORMAT "%-15s\t%s\n"
-
-void
-list_minus_o_opts ()
-{
- register int i;
- char *on = "on", *off = "off";
-
- printf (MINUS_O_FORMAT, "noclobber", (noclobber == 1) ? on : off);
-
- if (find_variable ("ignoreeof") || find_variable ("IGNOREEOF"))
- printf (MINUS_O_FORMAT, "ignoreeof", on);
- else
- printf (MINUS_O_FORMAT, "ignoreeof", off);
-
- printf (MINUS_O_FORMAT, "interactive-comments",
- interactive_comments ? on : off);
-
- printf (MINUS_O_FORMAT, "posix", posixly_correct ? on : off);
-
-#if defined (READLINE)
- if (no_line_editing)
- {
- printf (MINUS_O_FORMAT, "emacs", off);
- printf (MINUS_O_FORMAT, "vi", off);
- }
- else
- {
- /* Magic. This code `knows' how readline handles rl_editing_mode. */
- printf (MINUS_O_FORMAT, "emacs", (rl_editing_mode == 1) ? on : off);
- printf (MINUS_O_FORMAT, "vi", (rl_editing_mode == 0) ? on : off);
- }
-#endif /* READLINE */
-
- for (i = 0; o_options[i].name; i++)
- {
- int *on_or_off, zero = 0;
-
- on_or_off = find_flag (o_options[i].letter);
- if (on_or_off == FLAG_UNKNOWN)
- on_or_off = &zero;
- printf (MINUS_O_FORMAT, o_options[i].name, (*on_or_off == 1) ? on : off);
- }
-}
-
-set_minus_o_option (on_or_off, option_name)
- int on_or_off;
- char *option_name;
-{
- int option_char = -1;
-
- if (STREQ (option_name, "noclobber"))
- {
- if (on_or_off == FLAG_ON)
- bind_variable ("noclobber", "");
- else
- unbind_variable ("noclobber");
- stupidly_hack_special_variables ("noclobber");
- }
- else if (STREQ (option_name, "ignoreeof"))
- {
- unbind_variable ("ignoreeof");
- unbind_variable ("IGNOREEOF");
- if (on_or_off == FLAG_ON)
- bind_variable ("IGNOREEOF", "10");
- stupidly_hack_special_variables ("IGNOREEOF");
- }
-
-#if defined (READLINE)
- else if ((STREQ (option_name, "emacs")) || (STREQ (option_name, "vi")))
- {
- if (on_or_off == FLAG_ON)
- {
- rl_variable_bind ("editing-mode", option_name);
-
- if (interactive)
- with_input_from_stdin ();
- no_line_editing = 0;
- }
- else
- {
- int isemacs = (rl_editing_mode == 1);
- if ((isemacs && STREQ (option_name, "emacs")) ||
- (!isemacs && STREQ (option_name, "vi")))
- {
- if (interactive)
- with_input_from_stream (stdin, "stdin");
- no_line_editing = 1;
- }
- else
- builtin_error ("not in %s editing mode", option_name);
- }
- }
-#endif /* READLINE */
- else if (STREQ (option_name, "interactive-comments"))
- interactive_comments = (on_or_off == FLAG_ON);
- else if (STREQ (option_name, "posix"))
- {
- posixly_correct = (on_or_off == FLAG_ON);
- unbind_variable ("POSIXLY_CORRECT");
- unbind_variable ("POSIX_PEDANTIC");
- if (on_or_off == FLAG_ON)
- {
- bind_variable ("POSIXLY_CORRECT", "");
- stupidly_hack_special_variables ("POSIXLY_CORRECT");
- }
- }
- else
- {
- register int i;
- for (i = 0; o_options[i].name; i++)
- {
- if (STREQ (option_name, o_options[i].name))
- {
- option_char = o_options[i].letter;
- break;
- }
- }
- if (option_char == -1)
- {
- builtin_error ("%s: unknown option name", option_name);
- return (EXECUTION_FAILURE);
- }
- if (change_flag (option_char, on_or_off) == FLAG_ERROR)
- {
- bad_option (option_name);
- return (EXECUTION_FAILURE);
- }
- }
- return (EXECUTION_SUCCESS);
-}
-
-/* Set some flags from the word values in the input list. If LIST is empty,
- then print out the values of the variables instead. If LIST contains
- non-flags, then set $1 - $9 to the successive words of LIST. */
-set_builtin (list)
- WORD_LIST *list;
-{
- int on_or_off, flag_name, force_assignment = 0;
-
- if (!list)
- {
- SHELL_VAR **vars;
-
- vars = all_shell_variables ();
- if (vars)
- {
- print_var_list (vars);
- free (vars);
- }
-
- vars = all_shell_functions ();
- if (vars)
- {
- print_var_list (vars);
- free (vars);
- }
-
- return (EXECUTION_SUCCESS);
- }
-
- /* Check validity of flag arguments. */
- if (*list->word->word == '-' || *list->word->word == '+')
- {
- register char *arg;
- WORD_LIST *save_list = list;
-
- while (list && (arg = list->word->word))
- {
- char c;
-
- if (arg[0] != '-' && arg[0] != '+')
- break;
-
- /* `-' or `--' signifies end of flag arguments. */
- if (arg[0] == '-' &&
- (!arg[1] || (arg[1] == '-' && !arg[2])))
- break;
-
- while (c = *++arg)
- {
- if (find_flag (c) == FLAG_UNKNOWN && c != 'o')
- {
- char s[2];
- s[0] = c; s[1] = '\0';
- bad_option (s);
- if (c == '?')
- builtin_usage ();
- return (c == '?' ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
- }
- }
- list = list->next;
- }
- list = save_list;
- }
-
- /* Do the set command. While the list consists of words starting with
- '-' or '+' treat them as flags, otherwise, start assigning them to
- $1 ... $n. */
- while (list)
- {
- char *string = list->word->word;
-
- /* If the argument is `--' or `-' then signal the end of the list
- and remember the remaining arguments. */
- if (string[0] == '-' && (!string[1] || (string[1] == '-' && !string[2])))
- {
- list = list->next;
-
- /* `set --' unsets the positional parameters. */
- if (string[1] == '-')
- force_assignment = 1;
-
- /* Until told differently, the old shell behaviour of
- `set - [arg ...]' being equivalent to `set +xv [arg ...]'
- stands. Posix.2 says the behaviour is marked as obsolescent. */
- else
- {
- change_flag ('x', '+');
- change_flag ('v', '+');
- }
-
- break;
- }
-
- if ((on_or_off = *string) &&
- (on_or_off == '-' || on_or_off == '+'))
- {
- int i = 1;
- while (flag_name = string[i++])
- {
- if (flag_name == '?')
- {
- builtin_usage ();
- return (EXECUTION_SUCCESS);
- }
- else if (flag_name == 'o') /* -+o option-name */
- {
- char *option_name;
- WORD_LIST *opt;
-
- opt = list->next;
-
- if (!opt)
- {
- list_minus_o_opts ();
- continue;
- }
-
- option_name = opt->word->word;
-
- if (!option_name || !*option_name || (*option_name == '-'))
- {
- list_minus_o_opts ();
- continue;
- }
- list = list->next; /* Skip over option name. */
-
- if (set_minus_o_option (on_or_off, option_name) != EXECUTION_SUCCESS)
- return (EXECUTION_FAILURE);
- }
- else
- {
- if (change_flag (flag_name, on_or_off) == FLAG_ERROR)
- {
- char opt[3];
- opt[0] = on_or_off;
- opt[1] = flag_name;
- opt[2] = '\0';
- bad_option (opt);
- builtin_usage ();
- return (EXECUTION_FAILURE);
- }
- }
- }
- }
- else
- {
- break;
- }
- list = list->next;
- }
-
- /* Assigning $1 ... $n */
- if (list || force_assignment)
- remember_args (list, 1);
- return (EXECUTION_SUCCESS);
-}
-
-$BUILTIN unset
-$FUNCTION unset_builtin
-$SHORT_DOC unset [-f] [-v] [name ...]
-For each NAME, remove the corresponding variable or function. Given
-the `-v', unset will only act on variables. Given the `-f' flag,
-unset will only act on functions. With neither flag, unset first
-tries to unset a variable, and if that fails, then tries to unset a
-function. Some variables (such as PATH and IFS) cannot be unset; also
-see readonly.
-$END
-
-#define NEXT_VARIABLE() any_failed++; list = list->next; continue;
-
-unset_builtin (list)
- WORD_LIST *list;
-{
- int unset_function, unset_variable, unset_array, opt, any_failed;
- char *name;
-
- unset_function = unset_variable = unset_array = any_failed = 0;
-
- reset_internal_getopt ();
- while ((opt = internal_getopt (list, "fv")) != -1)
- {
- switch (opt)
- {
- case 'f':
- unset_function = 1;
- break;
- case 'v':
- unset_variable = 1;
- break;
- default:
- builtin_usage ();
- return (EXECUTION_FAILURE);
- }
- }
-
- list = loptend;
-
- if (unset_function && unset_variable)
- {
- builtin_error ("cannot simultaneously unset a function and a variable");
- return (EXECUTION_FAILURE);
- }
-
- while (list)
- {
- SHELL_VAR *var;
- int tem;
-#if defined (ARRAY_VARS)
- char *t;
-#endif
-
- name = list->word->word;
-
-#if defined (ARRAY_VARS)
- if (!unset_function && valid_array_reference (name))
- {
- t = strchr (name, '[');
- *t++ = '\0';
- unset_array++;
- }
-#endif
-
- var = unset_function ? find_function (name) : find_variable (name);
-
- if (var && !unset_function && non_unsettable_p (var))
- {
- builtin_error ("%s: cannot unset", name);
- NEXT_VARIABLE ();
- }
-
- /* Posix.2 says that unsetting readonly variables is an error. */
- if (var && readonly_p (var))
- {
- builtin_error ("%s: cannot unset: readonly %s",
- name, unset_function ? "function" : "variable");
- NEXT_VARIABLE ();
- }
-
- /* Unless the -f option is supplied, the name refers to a variable. */
-#if defined (ARRAY_VARS)
- if (var && unset_array)
- {
- if (array_p (var) == 0)
- {
- builtin_error ("%s: not an array variable", name);
- NEXT_VARIABLE ();
- }
- else
- tem = unbind_array_element (var, t);
- }
- else
-#endif /* ARRAY_VARS */
- tem = makunbound (name, unset_function ? shell_functions : shell_variables);
-
- /* This is what Posix.2 draft 11+ says. ``If neither -f nor -v
- is specified, the name refers to a variable; if a variable by
- that name does not exist, a function by that name, if any,
- shall be unset.'' */
- if ((tem == -1) && !unset_function && !unset_variable)
- tem = makunbound (name, shell_functions);
-
- if (tem == -1)
- any_failed++;
- else if (!unset_function)
- stupidly_hack_special_variables (name);
-
- list = list->next;
- }
-
- if (any_failed)
- return (EXECUTION_FAILURE);
- else
- return (EXECUTION_SUCCESS);
-}
+++ /dev/null
-/* unwind_prot.h - Macros and functions for hacking unwind protection. */
-
-/* Copyright (C) 1993 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2, or (at your option) any later
- version.
-
- Bash is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License along
- with Bash; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#if !defined (_UNWIND_PROT_H)
-#define _UNWIND_PROT_H
-
-/* Run a function without interrupts. */
-extern void begin_unwind_frame ();
-extern void discard_unwind_frame ();
-extern void run_unwind_frame ();
-extern void add_unwind_protect ();
-extern void remove_unwind_protect ();
-extern void run_unwind_protects ();
-extern void unwind_protect_var ();
-
-/* Define for people who like their code to look a certain way. */
-#define end_unwind_frame()
-
-/* How to protect an integer. */
-#define unwind_protect_int(X) unwind_protect_var (&(X), (char *)(X), sizeof (int))
-
-/* How to protect a pointer to a string. */
-#define unwind_protect_string(X) \
- unwind_protect_var ((int *)&(X), (X), sizeof (char *))
-
-/* How to protect any old pointer. */
-#define unwind_protect_pointer(X) unwind_protect_string (X)
-
-/* How to protect the contents of a jmp_buf. */
-#define unwind_protect_jmp_buf(X) \
- unwind_protect_var ((int *)(X), (char *)(X), sizeof (procenv_t))
-
-#endif /* _UNWIND_PROT_H */
+++ /dev/null
-This file is read.def, from which is created read.c.
-It implements the builtin "read" in Bash.
-
-Copyright (C) 1987-2012 Free Software Foundation, Inc.
-
-This file is part of GNU Bash, the Bourne Again SHell.
-
-Bash is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-Bash is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with Bash. If not, see <http://www.gnu.org/licenses/>.
-
-$PRODUCES read.c
-
-$BUILTIN read
-$FUNCTION read_builtin
-$SHORT_DOC read [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...]
-Read a line from the standard input and split it into fields.
-
-Reads a single line from the standard input, or from file descriptor FD
-if the -u option is supplied. The line is split into fields as with word
-splitting, and the first word is assigned to the first NAME, the second
-word to the second NAME, and so on, with any leftover words assigned to
-the last NAME. Only the characters found in $IFS are recognized as word
-delimiters.
-
-If no NAMEs are supplied, the line read is stored in the REPLY variable.
-
-Options:
- -a array assign the words read to sequential indices of the array
- variable ARRAY, starting at zero
- -d delim continue until the first character of DELIM is read, rather
- than newline
- -e use Readline to obtain the line in an interactive shell
- -i text Use TEXT as the initial text for Readline
- -n nchars return after reading NCHARS characters rather than waiting
- for a newline, but honor a delimiter if fewer than NCHARS
- characters are read before the delimiter
- -N nchars return only after reading exactly NCHARS characters, unless
- EOF is encountered or read times out, ignoring any delimiter
- -p prompt output the string PROMPT without a trailing newline before
- attempting to read
- -r do not allow backslashes to escape any characters
- -s do not echo input coming from a terminal
- -t timeout time out and return failure if a complete line of input is
- not read within TIMEOUT seconds. The value of the TMOUT
- variable is the default timeout. TIMEOUT may be a
- fractional number. If TIMEOUT is 0, read returns immediately,
- without trying to read any data, returning success only if
- input is available on the specified file descriptor. The
- exit status is greater than 128 if the timeout is exceeded
- -u fd read from file descriptor FD instead of the standard input
-
-Exit Status:
-The return code is zero, unless end-of-file is encountered, read times out
-(in which case it's greater than 128), a variable assignment error occurs,
-or an invalid file descriptor is supplied as the argument to -u.
-$END
-
-#include <config.h>
-
-#include "bashtypes.h"
-#include "posixstat.h"
-
-#include <stdio.h>
-
-#include "bashansi.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include <signal.h>
-#include <errno.h>
-
-#ifdef __CYGWIN__
-# include <fcntl.h>
-# include <io.h>
-#endif
-
-#include "../bashintl.h"
-
-#include "../shell.h"
-#include "common.h"
-#include "bashgetopt.h"
-
-#include <shtty.h>
-
-#if defined (READLINE)
-#include "../bashline.h"
-#include <readline/readline.h>
-#endif
-
-#if defined (BUFFERED_INPUT)
-# include "input.h"
-#endif
-
-#include "shmbutil.h"
-
-#if !defined(errno)
-extern int errno;
-#endif
-
-extern void run_pending_traps __P((void));
-
-extern int posixly_correct;
-extern int trapped_signal_received;
-
-struct ttsave
-{
- int fd;
- TTYSTRUCT *attrs;
-};
-
-#if defined (READLINE)
-static void reset_attempted_completion_function __P((char *));
-static int set_itext __P((void));
-static char *edit_line __P((char *, char *));
-static void set_eol_delim __P((int));
-static void reset_eol_delim __P((char *));
-#endif
-static SHELL_VAR *bind_read_variable __P((char *, char *));
-#if defined (HANDLE_MULTIBYTE)
-static int read_mbchar __P((int, char *, int, int, int));
-#endif
-static void ttyrestore __P((struct ttsave *));
-
-static sighandler sigalrm __P((int));
-static void reset_alarm __P((void));
-
-/* Try this to see what the rest of the shell can do with the information. */
-procenv_t alrmbuf;
-int sigalrm_seen;
-
-static int reading;
-static SigHandler *old_alrm;
-static unsigned char delim;
-
-/* In all cases, SIGALRM just sets a flag that we check periodically. This
- avoids problems with the semi-tricky stuff we do with the xfree of
- input_string at the top of the unwind-protect list (see below). */
-
-/* Set a flag that CHECK_ALRM can check. This relies on zread calling
- trap.c:check_signals_and_traps(), which knows about sigalrm_seen and
- alrmbuf. */
-static sighandler
-sigalrm (s)
- int s;
-{
-itrace("sigalrm: reading = %d", reading);
- sigalrm_seen = 1;
-}
-
-static void
-reset_alarm ()
-{
-itrace("reset_alarm: resetting SIGALRM handler to %p", old_alrm);
- set_signal_handler (SIGALRM, old_alrm);
- falarm (0, 0);
-}
-
-/* Read the value of the shell variables whose names follow.
- The reading is done from the current input stream, whatever
- that may be. Successive words of the input line are assigned
- to the variables mentioned in LIST. The last variable in LIST
- gets the remainder of the words on the line. If no variables
- are mentioned in LIST, then the default variable is $REPLY. */
-int
-read_builtin (list)
- WORD_LIST *list;
-{
- register char *varname;
- int size, i, nr, pass_next, saw_escape, eof, opt, retval, code, print_ps2;
- int input_is_tty, input_is_pipe, unbuffered_read, skip_ctlesc, skip_ctlnul;
- int raw, edit, nchars, silent, have_timeout, ignore_delim, fd, lastsig, t_errno;
- unsigned int tmsec, tmusec;
- long ival, uval;
- intmax_t intval;
- char c;
- char *input_string, *orig_input_string, *ifs_chars, *prompt, *arrayname;
- char *e, *t, *t1, *ps2, *tofree;
- struct stat tsb;
- SHELL_VAR *var;
- TTYSTRUCT ttattrs, ttset;
- struct ttsave termsave;
-#if defined (ARRAY_VARS)
- WORD_LIST *alist;
-#endif
-#if defined (READLINE)
- char *rlbuf, *itext;
- int rlind;
-#endif
-
- USE_VAR(size);
- USE_VAR(i);
- USE_VAR(pass_next);
- USE_VAR(print_ps2);
- USE_VAR(saw_escape);
- USE_VAR(input_is_pipe);
-/* USE_VAR(raw); */
- USE_VAR(edit);
- USE_VAR(tmsec);
- USE_VAR(tmusec);
- USE_VAR(nchars);
- USE_VAR(silent);
- USE_VAR(ifs_chars);
- USE_VAR(prompt);
- USE_VAR(arrayname);
-#if defined (READLINE)
- USE_VAR(rlbuf);
- USE_VAR(rlind);
- USE_VAR(itext);
-#endif
- USE_VAR(list);
- USE_VAR(ps2);
- USE_VAR(lastsig);
-
- sigalrm_seen = reading = 0;
-
- i = 0; /* Index into the string that we are reading. */
- raw = edit = 0; /* Not reading raw input by default. */
- silent = 0;
- arrayname = prompt = (char *)NULL;
- fd = 0; /* file descriptor to read from */
-
-#if defined (READLINE)
- rlbuf = itext = (char *)0;
- rlind = 0;
-#endif
-
- tmsec = tmusec = 0; /* no timeout */
- nr = nchars = input_is_tty = input_is_pipe = unbuffered_read = have_timeout = 0;
- delim = '\n'; /* read until newline */
- ignore_delim = 0;
-
- reset_internal_getopt ();
- while ((opt = internal_getopt (list, "ersa:d:i:n:p:t:u:N:")) != -1)
- {
- switch (opt)
- {
- case 'r':
- raw = 1;
- break;
- case 'p':
- prompt = list_optarg;
- break;
- case 's':
- silent = 1;
- break;
- case 'e':
-#if defined (READLINE)
- edit = 1;
-#endif
- break;
- case 'i':
-#if defined (READLINE)
- itext = list_optarg;
-#endif
- break;
-#if defined (ARRAY_VARS)
- case 'a':
- arrayname = list_optarg;
- break;
-#endif
- case 't':
- code = uconvert (list_optarg, &ival, &uval);
- if (code == 0 || ival < 0 || uval < 0)
- {
- builtin_error (_("%s: invalid timeout specification"), list_optarg);
- return (EXECUTION_FAILURE);
- }
- else
- {
- have_timeout = 1;
- tmsec = ival;
- tmusec = uval;
- }
- break;
- case 'N':
- ignore_delim = 1;
- delim = -1;
- case 'n':
- code = legal_number (list_optarg, &intval);
- if (code == 0 || intval < 0 || intval != (int)intval)
- {
- sh_invalidnum (list_optarg);
- return (EXECUTION_FAILURE);
- }
- else
- nchars = intval;
- break;
- case 'u':
- code = legal_number (list_optarg, &intval);
- if (code == 0 || intval < 0 || intval != (int)intval)
- {
- builtin_error (_("%s: invalid file descriptor specification"), list_optarg);
- return (EXECUTION_FAILURE);
- }
- else
- fd = intval;
- if (sh_validfd (fd) == 0)
- {
- builtin_error (_("%d: invalid file descriptor: %s"), fd, strerror (errno));
- return (EXECUTION_FAILURE);
- }
- break;
- case 'd':
- delim = *list_optarg;
- break;
- default:
- builtin_usage ();
- return (EX_USAGE);
- }
- }
- list = loptend;
-
- /* `read -t 0 var' tests whether input is available with select/FIONREAD,
- and fails if those are unavailable */
- if (have_timeout && tmsec == 0 && tmusec == 0)
-#if 0
- return (EXECUTION_FAILURE);
-#else
- return (input_avail (fd) ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
-#endif
-
- /* If we're asked to ignore the delimiter, make sure we do. */
- if (ignore_delim)
- delim = -1;
-
- /* IF IFS is unset, we use the default of " \t\n". */
- ifs_chars = getifs ();
- if (ifs_chars == 0) /* XXX - shouldn't happen */
- ifs_chars = "";
- /* If we want to read exactly NCHARS chars, don't split on IFS */
- if (ignore_delim)
- ifs_chars = "";
- for (skip_ctlesc = skip_ctlnul = 0, e = ifs_chars; *e; e++)
- skip_ctlesc |= *e == CTLESC, skip_ctlnul |= *e == CTLNUL;
-
- input_string = (char *)xmalloc (size = 112); /* XXX was 128 */
- input_string[0] = '\0';
-
- /* $TMOUT, if set, is the default timeout for read. */
- if (have_timeout == 0 && (e = get_string_value ("TMOUT")))
- {
- code = uconvert (e, &ival, &uval);
- if (code == 0 || ival < 0 || uval < 0)
- tmsec = tmusec = 0;
- else
- {
- tmsec = ival;
- tmusec = uval;
- }
- }
-
- begin_unwind_frame ("read_builtin");
-
-#if defined (BUFFERED_INPUT)
- if (interactive == 0 && default_buffered_input >= 0 && fd_is_bash_input (fd))
- sync_buffered_stream (default_buffered_input);
-#endif
-
- input_is_tty = isatty (fd);
- if (input_is_tty == 0)
-#ifndef __CYGWIN__
- input_is_pipe = (lseek (fd, 0L, SEEK_CUR) < 0) && (errno == ESPIPE);
-#else
- input_is_pipe = 1;
-#endif
-
- /* If the -p, -e or -s flags were given, but input is not coming from the
- terminal, turn them off. */
- if ((prompt || edit || silent) && input_is_tty == 0)
- {
- prompt = (char *)NULL;
-#if defined (READLINE)
- itext = (char *)NULL;
-#endif
- edit = silent = 0;
- }
-
-#if defined (READLINE)
- if (edit)
- add_unwind_protect (xfree, rlbuf);
-#endif
-
- pass_next = 0; /* Non-zero signifies last char was backslash. */
- saw_escape = 0; /* Non-zero signifies that we saw an escape char */
-
- if (tmsec > 0 || tmusec > 0)
- {
- /* Turn off the timeout if stdin is a regular file (e.g. from
- input redirection). */
- if ((fstat (fd, &tsb) < 0) || S_ISREG (tsb.st_mode))
- tmsec = tmusec = 0;
- }
-
- if (tmsec > 0 || tmusec > 0)
- {
- code = setjmp_nosigs (alrmbuf);
- if (code)
- {
-itrace("read_builtin: longjmp to alrmbuf code = %d", code);
- sigalrm_seen = 0;
- /* Tricky. The top of the unwind-protect stack is the free of
- input_string. We want to run all the rest and use input_string,
- so we have to save input_string temporarily, run the unwind-
- protects, then restore input_string so we can use it later */
- orig_input_string = 0;
- input_string[i] = '\0'; /* make sure it's terminated */
- if (i == 0)
- {
- t = (char *)xmalloc (1);
- t[0] = 0;
- }
- else
- t = savestring (input_string);
-
- run_unwind_frame ("read_builtin");
- input_string = t;
- retval = 128+SIGALRM;
- goto assign_vars;
- }
- old_alrm = set_signal_handler (SIGALRM, sigalrm);
-itrace("read_builtin: set_signal_handler for SIGALRM to sigalrm");
- add_unwind_protect (reset_alarm, (char *)NULL);
-#if defined (READLINE)
- if (edit)
- add_unwind_protect (reset_attempted_completion_function, (char *)NULL);
-#endif
- falarm (tmsec, tmusec);
-itrace("read_builtin: set falarm %d %d", tmsec, tmusec);
- }
-
- /* If we've been asked to read only NCHARS chars, or we're using some
- character other than newline to terminate the line, do the right
- thing to readline or the tty. */
- if (nchars > 0 || delim != '\n')
- {
-#if defined (READLINE)
- if (edit)
- {
- if (nchars > 0)
- {
- unwind_protect_int (rl_num_chars_to_read);
- rl_num_chars_to_read = nchars;
- }
- if (delim != '\n')
- {
- set_eol_delim (delim);
- add_unwind_protect (reset_eol_delim, (char *)NULL);
- }
- }
- else
-#endif
- if (input_is_tty)
- {
- /* ttsave() */
- termsave.fd = fd;
- ttgetattr (fd, &ttattrs);
- termsave.attrs = &ttattrs;
-
- ttset = ttattrs;
- i = silent ? ttfd_cbreak (fd, &ttset) : ttfd_onechar (fd, &ttset);
- if (i < 0)
- sh_ttyerror (1);
- add_unwind_protect ((Function *)ttyrestore, (char *)&termsave);
- }
- }
- else if (silent) /* turn off echo but leave term in canonical mode */
- {
- /* ttsave (); */
- termsave.fd = fd;
- ttgetattr (fd, &ttattrs);
- termsave.attrs = &ttattrs;
-
- ttset = ttattrs;
- i = ttfd_noecho (fd, &ttset); /* ttnoecho (); */
- if (i < 0)
- sh_ttyerror (1);
-
- add_unwind_protect ((Function *)ttyrestore, (char *)&termsave);
- }
-
- /* This *must* be the top unwind-protect on the stack, so the manipulation
- of the unwind-protect stack after the realloc() works right. */
- add_unwind_protect (xfree, input_string);
-
- CHECK_ALRM;
- if ((nchars > 0) && (input_is_tty == 0) && ignore_delim) /* read -N */
- unbuffered_read = 2;
- else if ((nchars > 0) || (delim != '\n') || input_is_pipe)
- unbuffered_read = 1;
-
- if (prompt && edit == 0)
- {
- fprintf (stderr, "%s", prompt);
- fflush (stderr);
- }
-
-#if defined (__CYGWIN__) && defined (O_TEXT)
- setmode (0, O_TEXT);
-#endif
-
- ps2 = 0;
- for (print_ps2 = eof = retval = 0;;)
- {
- CHECK_ALRM;
-
-#if defined (READLINE)
- if (edit)
- {
- if (rlbuf && rlbuf[rlind] == '\0')
- {
- xfree (rlbuf);
- rlbuf = (char *)0;
- }
- if (rlbuf == 0)
- {
- reading = 1;
- rlbuf = edit_line (prompt ? prompt : "", itext);
- reading = 0;
- rlind = 0;
- }
- if (rlbuf == 0)
- {
- eof = 1;
- break;
- }
- c = rlbuf[rlind++];
- }
- else
- {
-#endif
-
- if (print_ps2)
- {
- if (ps2 == 0)
- ps2 = get_string_value ("PS2");
- fprintf (stderr, "%s", ps2 ? ps2 : "");
- fflush (stderr);
- print_ps2 = 0;
- }
-
-#if 0
- if (posixly_correct == 0)
- interrupt_immediately++;
-#endif
- reading = 1;
- if (unbuffered_read == 2)
- retval = posixly_correct ? zreadintr (fd, &c, 1) : zreadn (fd, &c, nchars - nr);
- else if (unbuffered_read)
- retval = posixly_correct ? zreadintr (fd, &c, 1) : zread (fd, &c, 1);
- else
- retval = posixly_correct ? zreadcintr (fd, &c) : zreadc (fd, &c);
- reading = 0;
-#if 0
- if (posixly_correct == 0)
- interrupt_immediately--;
-#endif
-
- if (retval <= 0)
- {
- if (retval < 0 && errno == EINTR)
- {
- lastsig = LASTSIG();
- if (lastsig == 0)
- lastsig = trapped_signal_received;
- run_pending_traps (); /* because interrupt_immediately is not set */
- }
- else
- lastsig = 0;
- CHECK_TERMSIG;
- eof = 1;
- break;
- }
-
- CHECK_ALRM;
-
-#if defined (READLINE)
- }
-#endif
-
- CHECK_ALRM;
- if (i + 4 >= size) /* XXX was i + 2; use i + 4 for multibyte/read_mbchar */
- {
- char *t;
- t = (char *)xrealloc (input_string, size += 128);
-
- /* Only need to change unwind-protect if input_string changes */
- if (t != input_string)
- {
- input_string = t;
- remove_unwind_protect ();
- add_unwind_protect (xfree, input_string);
- }
- }
-
- /* If the next character is to be accepted verbatim, a backslash
- newline pair still disappears from the input. */
- if (pass_next)
- {
- pass_next = 0;
- if (c == '\n')
- {
- i--; /* back up over the CTLESC */
- if (interactive && input_is_tty && raw == 0)
- print_ps2 = 1;
- }
- else
- goto add_char;
- continue;
- }
-
- /* This may cause problems if IFS contains CTLESC */
- if (c == '\\' && raw == 0)
- {
- pass_next++;
- if (skip_ctlesc == 0)
- {
- saw_escape++;
- input_string[i++] = CTLESC;
- }
- continue;
- }
-
- if ((unsigned char)c == delim)
- break;
-
- if (c == '\0' && delim != '\0')
- continue; /* skip NUL bytes in input */
-
- if ((skip_ctlesc == 0 && c == CTLESC) || (skip_ctlnul == 0 && c == CTLNUL))
- {
- saw_escape++;
- input_string[i++] = CTLESC;
- }
-
-add_char:
- input_string[i++] = c;
- CHECK_ALRM;
-
-#if defined (HANDLE_MULTIBYTE)
- if (nchars > 0 && MB_CUR_MAX > 1 && is_basic (c) == 0)
- {
- input_string[i] = '\0'; /* for simplicity and debugging */
- i += read_mbchar (fd, input_string, i, c, unbuffered_read);
- }
-#endif
-
- nr++;
-
- if (nchars > 0 && nr >= nchars)
- break;
- }
- input_string[i] = '\0';
- CHECK_ALRM;
-
- if (retval < 0)
- {
- t_errno = errno;
- if (errno != EINTR)
- builtin_error (_("read error: %d: %s"), fd, strerror (errno));
- run_unwind_frame ("read_builtin");
- return ((t_errno != EINTR) ? EXECUTION_FAILURE : 128+lastsig);
- }
-
- if (tmsec > 0 || tmusec > 0)
- reset_alarm ();
-
- if (nchars > 0 || delim != '\n')
- {
-#if defined (READLINE)
- if (edit)
- {
- if (nchars > 0)
- rl_num_chars_to_read = 0;
- if (delim != '\n')
- reset_eol_delim ((char *)NULL);
- }
- else
-#endif
- if (input_is_tty)
- ttyrestore (&termsave);
- }
- else if (silent)
- ttyrestore (&termsave);
-
- if (unbuffered_read == 0)
- zsyncfd (fd);
-
- discard_unwind_frame ("read_builtin");
-
- retval = eof ? EXECUTION_FAILURE : EXECUTION_SUCCESS;
-
-assign_vars:
-
-#if defined (ARRAY_VARS)
- /* If -a was given, take the string read, break it into a list of words,
- an assign them to `arrayname' in turn. */
- if (arrayname)
- {
- if (legal_identifier (arrayname) == 0)
- {
- sh_invalidid (arrayname);
- xfree (input_string);
- return (EXECUTION_FAILURE);
- }
-
- var = find_or_make_array_variable (arrayname, 1);
- if (var == 0)
- {
- xfree (input_string);
- return EXECUTION_FAILURE; /* readonly or noassign */
- }
- if (assoc_p (var))
- {
- builtin_error (_("%s: cannot convert associative to indexed array"), arrayname);
- xfree (input_string);
- return EXECUTION_FAILURE; /* existing associative array */
- }
- else if (invisible_p (var))
- VUNSETATTR (var, att_invisible);
- array_flush (array_cell (var));
-
- alist = list_string (input_string, ifs_chars, 0);
- if (alist)
- {
- if (saw_escape)
- dequote_list (alist);
- else
- word_list_remove_quoted_nulls (alist);
- assign_array_var_from_word_list (var, alist, 0);
- dispose_words (alist);
- }
- xfree (input_string);
- return (retval);
- }
-#endif /* ARRAY_VARS */
-
- /* If there are no variables, save the text of the line read to the
- variable $REPLY. ksh93 strips leading and trailing IFS whitespace,
- so that `read x ; echo "$x"' and `read ; echo "$REPLY"' behave the
- same way, but I believe that the difference in behaviors is useful
- enough to not do it. Without the bash behavior, there is no way
- to read a line completely without interpretation or modification
- unless you mess with $IFS (e.g., setting it to the empty string).
- If you disagree, change the occurrences of `#if 0' to `#if 1' below. */
- if (list == 0)
- {
-#if 0
- orig_input_string = input_string;
- for (t = input_string; ifs_chars && *ifs_chars && spctabnl(*t) && isifs(*t); t++)
- ;
- input_string = t;
- input_string = strip_trailing_ifs_whitespace (input_string, ifs_chars, saw_escape);
-#endif
-
- if (saw_escape)
- {
- t = dequote_string (input_string);
- var = bind_variable ("REPLY", t, 0);
- free (t);
- }
- else
- var = bind_variable ("REPLY", input_string, 0);
- VUNSETATTR (var, att_invisible);
-
- xfree (input_string);
- return (retval);
- }
-
- /* This code implements the Posix.2 spec for splitting the words
- read and assigning them to variables. */
- orig_input_string = input_string;
-
- /* Remove IFS white space at the beginning of the input string. If
- $IFS is null, no field splitting is performed. */
- for (t = input_string; ifs_chars && *ifs_chars && spctabnl(*t) && isifs(*t); t++)
- ;
- input_string = t;
- for (; list->next; list = list->next)
- {
- varname = list->word->word;
-#if defined (ARRAY_VARS)
- if (legal_identifier (varname) == 0 && valid_array_reference (varname) == 0)
-#else
- if (legal_identifier (varname) == 0)
-#endif
- {
- sh_invalidid (varname);
- xfree (orig_input_string);
- return (EXECUTION_FAILURE);
- }
-
- /* If there are more variables than words read from the input,
- the remaining variables are set to the empty string. */
- if (*input_string)
- {
- /* This call updates INPUT_STRING. */
- t = get_word_from_string (&input_string, ifs_chars, &e);
- if (t)
- *e = '\0';
- /* Don't bother to remove the CTLESC unless we added one
- somewhere while reading the string. */
- if (t && saw_escape)
- {
- t1 = dequote_string (t);
- var = bind_read_variable (varname, t1);
- xfree (t1);
- }
- else
- var = bind_read_variable (varname, t ? t : "");
- }
- else
- {
- t = (char *)0;
- var = bind_read_variable (varname, "");
- }
-
- FREE (t);
- if (var == 0)
- {
- xfree (orig_input_string);
- return (EXECUTION_FAILURE);
- }
-
- stupidly_hack_special_variables (varname);
- VUNSETATTR (var, att_invisible);
- }
-
- /* Now assign the rest of the line to the last variable argument. */
-#if defined (ARRAY_VARS)
- if (legal_identifier (list->word->word) == 0 && valid_array_reference (list->word->word) == 0)
-#else
- if (legal_identifier (list->word->word) == 0)
-#endif
- {
- sh_invalidid (list->word->word);
- xfree (orig_input_string);
- return (EXECUTION_FAILURE);
- }
-
-#if 0
- /* This has to be done this way rather than using string_list
- and list_string because Posix.2 says that the last variable gets the
- remaining words and their intervening separators. */
- input_string = strip_trailing_ifs_whitespace (input_string, ifs_chars, saw_escape);
-#else
- /* Check whether or not the number of fields is exactly the same as the
- number of variables. */
- tofree = NULL;
- if (*input_string)
- {
- t1 = input_string;
- t = get_word_from_string (&input_string, ifs_chars, &e);
- if (*input_string == 0)
- tofree = input_string = t;
- else
- {
- input_string = strip_trailing_ifs_whitespace (t1, ifs_chars, saw_escape);
- tofree = t;
- }
- }
-#endif
-
- if (saw_escape && input_string && *input_string)
- {
- t = dequote_string (input_string);
- var = bind_read_variable (list->word->word, t);
- xfree (t);
- }
- else
- var = bind_read_variable (list->word->word, input_string ? input_string : "");
-
- if (var)
- {
- stupidly_hack_special_variables (list->word->word);
- VUNSETATTR (var, att_invisible);
- }
- else
- retval = EXECUTION_FAILURE;
-
- FREE (tofree);
- xfree (orig_input_string);
-
- return (retval);
-}
-
-static SHELL_VAR *
-bind_read_variable (name, value)
- char *name, *value;
-{
- SHELL_VAR *v;
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name) == 0)
- v = bind_variable (name, value, 0);
- else
- v = assign_array_element (name, value, 0);
-#else /* !ARRAY_VARS */
- v = bind_variable (name, value, 0);
-#endif /* !ARRAY_VARS */
- return (v == 0 ? v
- : ((readonly_p (v) || noassign_p (v)) ? (SHELL_VAR *)NULL : v));
-}
-
-#if defined (HANDLE_MULTIBYTE)
-static int
-read_mbchar (fd, string, ind, ch, unbuffered)
- int fd;
- char *string;
- int ind, ch, unbuffered;
-{
- char mbchar[MB_LEN_MAX + 1];
- int i, n, r;
- char c;
- size_t ret;
- mbstate_t ps, ps_back;
- wchar_t wc;
-
- memset (&ps, '\0', sizeof (mbstate_t));
- memset (&ps_back, '\0', sizeof (mbstate_t));
-
- mbchar[0] = ch;
- i = 1;
- for (n = 0; n <= MB_LEN_MAX; n++)
- {
- ps_back = ps;
- ret = mbrtowc (&wc, mbchar, i, &ps);
- if (ret == (size_t)-2)
- {
- ps = ps_back;
- /* We don't want to be interrupted during a multibyte char read */
- if (unbuffered)
- r = zread (fd, &c, 1);
- else
- r = zreadc (fd, &c);
- if (r < 0)
- goto mbchar_return;
- mbchar[i++] = c;
- continue;
- }
- else if (ret == (size_t)-1 || ret == (size_t)0 || ret > (size_t)0)
- break;
- }
-
-mbchar_return:
- if (i > 1) /* read a multibyte char */
- /* mbchar[0] is already string[ind-1] */
- for (r = 1; r < i; r++)
- string[ind+r-1] = mbchar[r];
- return i - 1;
-}
-#endif
-
-
-static void
-ttyrestore (ttp)
- struct ttsave *ttp;
-{
- ttsetattr (ttp->fd, ttp->attrs);
-}
-
-#if defined (READLINE)
-static rl_completion_func_t *old_attempted_completion_function = 0;
-static rl_hook_func_t *old_startup_hook;
-static char *deftext;
-
-static void
-reset_attempted_completion_function (cp)
- char *cp;
-{
- if (rl_attempted_completion_function == 0 && old_attempted_completion_function)
- rl_attempted_completion_function = old_attempted_completion_function;
-}
-
-static int
-set_itext ()
-{
- int r1, r2;
-
- r1 = r2 = 0;
- if (old_startup_hook)
- r1 = (*old_startup_hook) ();
- if (deftext)
- {
- r2 = rl_insert_text (deftext);
- deftext = (char *)NULL;
- rl_startup_hook = old_startup_hook;
- old_startup_hook = (rl_hook_func_t *)NULL;
- }
- return (r1 || r2);
-}
-
-static char *
-edit_line (p, itext)
- char *p;
- char *itext;
-{
- char *ret;
- int len;
-
- if (bash_readline_initialized == 0)
- initialize_readline ();
-
- old_attempted_completion_function = rl_attempted_completion_function;
- rl_attempted_completion_function = (rl_completion_func_t *)NULL;
- if (itext)
- {
- old_startup_hook = rl_startup_hook;
- rl_startup_hook = set_itext;
- deftext = itext;
- }
-
- ret = readline (p);
-
- rl_attempted_completion_function = old_attempted_completion_function;
- old_attempted_completion_function = (rl_completion_func_t *)NULL;
-
- if (ret == 0)
- return ret;
- len = strlen (ret);
- ret = (char *)xrealloc (ret, len + 2);
- ret[len++] = delim;
- ret[len] = '\0';
- return ret;
-}
-
-static int old_delim_ctype;
-static rl_command_func_t *old_delim_func;
-static int old_newline_ctype;
-static rl_command_func_t *old_newline_func;
-
-static unsigned char delim_char;
-
-static void
-set_eol_delim (c)
- int c;
-{
- Keymap cmap;
-
- if (bash_readline_initialized == 0)
- initialize_readline ();
- cmap = rl_get_keymap ();
-
- /* Change newline to self-insert */
- old_newline_ctype = cmap[RETURN].type;
- old_newline_func = cmap[RETURN].function;
- cmap[RETURN].type = ISFUNC;
- cmap[RETURN].function = rl_insert;
-
- /* Bind the delimiter character to accept-line. */
- old_delim_ctype = cmap[c].type;
- old_delim_func = cmap[c].function;
- cmap[c].type = ISFUNC;
- cmap[c].function = rl_newline;
-
- delim_char = c;
-}
-
-static void
-reset_eol_delim (cp)
- char *cp;
-{
- Keymap cmap;
-
- cmap = rl_get_keymap ();
-
- cmap[RETURN].type = old_newline_ctype;
- cmap[RETURN].function = old_newline_func;
-
- cmap[delim_char].type = old_delim_ctype;
- cmap[delim_char].function = old_delim_func;
-}
-#endif
+++ /dev/null
-# This file is a shell script that caches the results of configure
-# tests for CYGWIN32 so they don't need to be done when cross-compiling.
-
-# AC_FUNC_GETPGRP should also define GETPGRP_VOID
-ac_cv_func_getpgrp_void=${ac_cv_func_getpgrp_void='yes'}
-# AC_FUNC_SETVBUF_REVERSED should not define anything else
-ac_cv_func_setvbuf_reversed=${ac_cv_func_setvbuf_reversed='no'}
-# on CYGWIN32, system calls do not restart
-ac_cv_sys_restartable_syscalls=${ac_cv_sys_restartable_syscalls='no'}
-bash_cv_sys_restartable_syscalls=${bash_cv_sys_restartable_syscalls='no'}
-
-# these may be necessary, but they are currently commented out
-#ac_cv_c_bigendian=${ac_cv_c_bigendian='no'}
-ac_cv_sizeof_char_p=${ac_cv_sizeof_char_p='4'}
-ac_cv_sizeof_int=${ac_cv_sizeof_int='4'}
-ac_cv_sizeof_long=${ac_cv_sizeof_long='4'}
-ac_cv_sizeof_double=${ac_cv_sizeof_double='8'}
-
-bash_cv_dup2_broken=${bash_cv_dup2_broken='no'}
-bash_cv_pgrp_pipe=${bash_cv_pgrp_pipe='no'}
-bash_cv_type_rlimit=${bash_cv_type_rlimit='long'}
-bash_cv_decl_under_sys_siglist=${bash_cv_decl_under_sys_siglist='no'}
-bash_cv_under_sys_siglist=${bash_cv_under_sys_siglist='no'}
-bash_cv_sys_siglist=${bash_cv_sys_siglist='no'}
-bash_cv_opendir_not_robust=${bash_cv_opendir_not_robust='no'}
-bash_cv_getenv_redef=${bash_cv_getenv_redef='yes'}
-bash_cv_printf_declared=${bash_cv_printf_declared='yes'}
-bash_cv_ulimit_maxfds=${bash_cv_ulimit_maxfds='no'}
-bash_cv_getcwd_calls_popen=${bash_cv_getcwd_calls_popen='no'}
-bash_cv_must_reinstall_sighandlers=${bash_cv_must_reinstall_sighandlers='no'}
-bash_cv_job_control_missing=${bash_cv_job_control_missing='present'}
-bash_cv_sys_named_pipes=${bash_cv_sys_named_pipes='missing'}
-bash_cv_func_sigsetjmp=${bash_cv_func_sigsetjmp='missing'}
-bash_cv_mail_dir=${bash_cv_mail_dir='unknown'}
-bash_cv_func_strcoll_broken=${bash_cv_func_strcoll_broken='no'}
-
-bash_cv_type_int32_t=${bash_cv_type_int32_t='int'}
-bash_cv_type_u_int32_t=${bash_cv_type_u_int32_t='int'}
-
-ac_cv_type_bits64_t=${ac_cv_type_bits64_t='no'}
-
-# end of cross-build/cygwin32.cache
+++ /dev/null
-This is the Bash FAQ, version 3.24, for Bash version 2.05b.
-
-This document contains a set of frequently-asked questions concerning
-Bash, the GNU Bourne-Again Shell. Bash is a freely-available command
-interpreter with advanced features for both interactive use and shell
-programming.
-
-Another good source of basic information about shells is the collection
-of FAQ articles periodically posted to comp.unix.shell.
-
-Questions and comments concerning this document should be sent to
-chet@po.cwru.edu.
-
-This document is available for anonymous FTP with the URL
-
-ftp://ftp.cwru.edu/pub/bash/FAQ
-
-The Bash home page is http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html
-
-----------
-Contents:
-
-Section A: The Basics
-
-A1) What is it?
-A2) What's the latest version?
-A3) Where can I get it?
-A4) On what machines will bash run?
-A5) Will bash run on operating systems other than Unix?
-A6) How can I build bash with gcc?
-A7) How can I make bash my login shell?
-A8) I just changed my login shell to bash, and now I can't FTP into my
- machine. Why not?
-A9) What's the `POSIX 1003.2 standard'?
-A10) What is the bash `posix mode'?
-
-Section B: The latest version
-
-B1) What's new in version 2.05b?
-B2) Are there any user-visible incompatibilities between bash-2.05b and
- bash-1.14.7?
-
-Section C: Differences from other Unix shells
-
-C1) How does bash differ from sh, the Bourne shell?
-C2) How does bash differ from the Korn shell, version ksh88?
-C3) Which new features in ksh-93 are not in bash, and which are?
-
-Section D: Why does bash do some things differently than other Unix shells?
-
-D1) Why does bash run a different version of `command' than
- `which command' says it will?
-D2) Why doesn't bash treat brace expansions exactly like csh?
-D3) Why doesn't bash have csh variable modifiers?
-D4) How can I make my csh aliases work when I convert to bash?
-D5) How can I pipe standard output and standard error from one command to
- another, like csh does with `|&'?
-D6) Now that I've converted from ksh to bash, are there equivalents to
- ksh features like autoloaded functions and the `whence' command?
-
-Section E: Why does bash do certain things the way it does?
-
-E1) Why is the bash builtin `test' slightly different from /bin/test?
-E2) Why does bash sometimes say `Broken pipe'?
-E3) When I have terminal escape sequences in my prompt, why does bash
- wrap lines at the wrong column?
-E4) If I pipe the output of a command into `read variable', why doesn't
- the output show up in $variable when the read command finishes?
-E5) I have a bunch of shell scripts that use backslash-escaped characters
- in arguments to `echo'. Bash doesn't interpret these characters. Why
- not, and how can I make it understand them?
-E6) Why doesn't a while or for loop get suspended when I type ^Z?
-E7) What about empty for loops in Makefiles?
-E8) Why does the arithmetic evaluation code complain about `08'?
-E9) Why does the pattern matching expression [A-Z]* match files beginning
- with every letter except `z'?
-E10) Why does `cd //' leave $PWD as `//'?
-E11) If I resize my xterm while another program is running, why doesn't bash
- notice the change?
-
-Section F: Things to watch out for on certain Unix versions
-
-F1) Why can't I use command line editing in my `cmdtool'?
-F2) I built bash on Solaris 2. Why do globbing expansions and filename
- completion chop off the first few characters of each filename?
-F3) Why does bash dump core after I interrupt username completion or
- `~user' tilde expansion on a machine running NIS?
-F4) I'm running SVR4.2. Why is the line erased every time I type `@'?
-F5) Why does bash report syntax errors when my C News scripts use a
- redirection before a subshell command?
-F6) Why can't I use vi-mode editing on Red Hat Linux 6.1?
-F7) Why do bash-2.05a and bash-2.05b fail to compile `printf.def' on
- HP/UX 11.x?
-
-Section G: How can I get bash to do certain common things?
-
-G1) How can I get bash to read and display eight-bit characters?
-G2) How do I write a function `x' to replace builtin command `x', but
- still invoke the command from within the function?
-G3) How can I find the value of a shell variable whose name is the value
- of another shell variable?
-G4) How can I make the bash `time' reserved word print timing output that
- looks like the output from my system's /usr/bin/time?
-G5) How do I get the current directory into my prompt?
-G6) How can I rename "*.foo" to "*.bar"?
-G7) How can I translate a filename from uppercase to lowercase?
-G8) How can I write a filename expansion (globbing) pattern that will match
- all files in the current directory except "." and ".."?
-
-Section H: Where do I go from here?
-
-H1) How do I report bugs in bash, and where should I look for fixes and
- advice?
-H2) What kind of bash documentation is there?
-H3) What's coming in future versions?
-H4) What's on the bash `wish list'?
-H5) When will the next release appear?
-
-----------
-Section A: The Basics
-
-A1) What is it?
-
-Bash is a Unix command interpreter (shell). It is an implementation of
-the Posix 1003.2 shell standard, and resembles the Korn and System V
-shells.
-
-Bash contains a number of enhancements over those shells, both
-for interactive use and shell programming. Features geared
-toward interactive use include command line editing, command
-history, job control, aliases, and prompt expansion. Programming
-features include additional variable expansions, shell
-arithmetic, and a number of variables and options to control
-shell behavior.
-
-Bash was originally written by Brian Fox of the Free Software
-Foundation. The current developer and maintainer is Chet Ramey
-of Case Western Reserve University.
-
-A2) What's the latest version?
-
-The latest version is 2.05b, first made available on Wednesday, 17
-July, 2002.
-
-A3) Where can I get it?
-
-Bash is the GNU project's shell, and so is available from the
-master GNU archive site, ftp.gnu.org, and its mirrors. The
-latest version is also available for FTP from ftp.cwru.edu.
-The following URLs tell how to get version 2.05b:
-
-ftp://ftp.gnu.org/pub/gnu/bash/bash-2.05b.tar.gz
-ftp://ftp.cwru.edu/pub/bash/bash-2.05b.tar.gz
-
-Formatted versions of the documentation are available with the URLs:
-
-ftp://ftp.gnu.org/pub/gnu/bash/bash-doc-2.05b.tar.gz
-ftp://ftp.cwru.edu/pub/bash/bash-doc-2.05b.tar.gz
-
-A4) On what machines will bash run?
-
-Bash has been ported to nearly every version of UNIX. All you
-should have to do to build it on a machine for which a port
-exists is to type `configure' and then `make'. The build process
-will attempt to discover the version of UNIX you have and tailor
-itself accordingly, using a script created by GNU autoconf.
-
-More information appears in the file `INSTALL' in the distribution.
-
-The Bash web page (http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html)
-explains how to obtain binary versions of bash for most of the major
-commercial Unix systems.
-
-A5) Will bash run on operating systems other than Unix?
-
-Configuration specifics for Unix-like systems such as QNX and
-LynxOS are included in the distribution. Bash-2.05 and later
-versions should compile and run on Minix 2.0 (patches were
-contributed), but I don't believe anyone has built bash-2.x on
-earlier Minix versions yet.
-
-Bash has been ported to versions of Windows implementing the Win32
-programming interface. This includes Windows 95 and Windows NT.
-The port was done by Cygnus Solutions as part of their CYGWIN
-project. For more information about the project, look at the URLs
-
-http://www.cygwin.com/
-http://sourceware.cygnus.com/cygwin
-
-Cygnus originally ported bash-1.14.7, and that port was part of their
-early GNU-Win32 (the original name) releases. Cygnus has also done a
-port of bash-2.05 to the CYGWIN environment, and it is available as
-part of their current release.
-
-Bash-2.05b should require no local Cygnus changes to build and run under
-CYGWIN.
-
-The Cygnus port works only on Intel machines. There is a port of bash
-(I don't know which version) to the alpha/NT environment available from
-
-ftp://ftp.gnustep.org//pub/win32/bash-alpha-nt-1.01.tar.gz
-
-DJ Delorie has a port of bash-2.x which runs under MS-DOS, as part
-of the DJGPP project. For more information on the project, see
-
-http://www.delorie.com/djgpp/
-
-I have been told that the original DJGPP port was done by Daisuke Aoyama.
-
-Mark Elbrecht <snowball3@bigfoot.com> has sent me notice that bash-2.04
-is available for DJGPP V2. The files are available as:
-
-ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204b.zip binary
-ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204d.zip documentation
-ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204s.zip source
-
-Mark has begun to work with bash-2.05, but I don't know the status.
-
-Ports of bash-1.12 and bash-2.0 are available for OS/2 from
-
-ftp://hobbes.nmsu.edu/pub/os2/util/shell/bash_112.zip
-ftp://hobbes.nmsu.edu/pub/os2/util/shell/bash-2.0(253).zip
-
-I haven't looked at either, but the second appears to be a binary-only
-distribution. Beware.
-
-I have received word that Bash (I'm not sure which version, but I
-believe that it's at least bash-2.02.1) is the standard shell on
-BeOS.
-
-A6) How can I build bash with gcc?
-
-Bash configures to use gcc by default if it is available. Read the
-file INSTALL in the distribution for more information.
-
-A7) How can I make bash my login shell?
-
-Some machines let you use `chsh' to change your login shell. Other
-systems use `passwd -s' or `passwd -e'. If one of these works for
-you, that's all you need. Note that many systems require the full
-pathname to a shell to appear in /etc/shells before you can make it
-your login shell. For this, you may need the assistance of your
-friendly local system administrator.
-
-If you cannot do this, you can still use bash as your login shell, but
-you need to perform some tricks. The basic idea is to add a command
-to your login shell's startup file to replace your login shell with
-bash.
-
-For example, if your login shell is csh or tcsh, and you have installed
-bash in /usr/gnu/bin/bash, add the following line to ~/.login:
-
- if ( -f /usr/gnu/bin/bash ) exec /usr/gnu/bin/bash --login
-
-(the `--login' tells bash that it is a login shell).
-
-It's not a good idea to put this command into ~/.cshrc, because every
-csh you run without the `-f' option, even ones started to run csh scripts,
-reads that file. If you must put the command in ~/.cshrc, use something
-like
-
- if ( $?prompt ) exec /usr/gnu/bin/bash --login
-
-to ensure that bash is exec'd only when the csh is interactive.
-
-If your login shell is sh or ksh, you have to do two things.
-
-First, create an empty file in your home directory named `.bash_profile'.
-The existence of this file will prevent the exec'd bash from trying to
-read ~/.profile, and re-execing itself over and over again. ~/.bash_profile
-is the first file bash tries to read initialization commands from when
-it is invoked as a login shell.
-
-Next, add a line similar to the above to ~/.profile:
-
- [ -f /usr/gnu/bin/bash ] && [ -x /usr/gnu/bin/bash ] && \
- exec /usr/gnu/bin/bash --login
-
-This will cause login shells to replace themselves with bash running as
-a login shell. Once you have this working, you can copy your initialization
-code from ~/.profile to ~/.bash_profile.
-
-I have received word that the recipe supplied above is insufficient for
-machines running CDE. CDE has a maze of twisty little startup files, all
-slightly different.
-
-If you cannot change your login shell in the password file to bash, you
-will have to (apparently) live with CDE using the shell in the password
-file to run its startup scripts. If you have changed your shell to bash,
-there is code in the CDE startup files (on Solaris, at least) that attempts
-to do the right thing. It is, however, often broken, and may require that
-you use the $BASH_ENV trick described below.
-
-`dtterm' claims to use $SHELL as the default program to start, so if you
-can change $SHELL in the CDE startup files, you should be able to use bash
-in your terminal windows.
-
-Setting DTSOURCEPROFILE in ~/.dtprofile will cause the `Xsession' program
-to read your login shell's startup files. You may be able to use bash for
-the rest of the CDE programs by setting SHELL to bash in ~/.dtprofile as
-well, but I have not tried this.
-
-You can use the above `exec' recipe to start bash when not logging in with
-CDE by testing the value of the DT variable:
-
- if [ -n "$DT" ]; then
- [ -f /usr/gnu/bin/bash ] && exec /usr/gnu/bin/bash --login
- fi
-
-If CDE starts its shells non-interactively during login, the login shell
-startup files (~/.profile, ~/.bash_profile) will not be sourced at login.
-To get around this problem, append a line similar to the following to your
-~/.dtprofile:
-
- BASH_ENV=${HOME}/.bash_profile ; export BASH_ENV
-
-and add the following line to the beginning of ~/.bash_profile:
-
- unset BASH_ENV
-
-A8) I just changed my login shell to bash, and now I can't FTP into my
- machine. Why not?
-
-You must add the full pathname to bash to the file /etc/shells. As
-noted in the answer to the previous question, many systems require
-this before you can make bash your login shell.
-
-Most versions of ftpd use this file to prohibit `special' users
-such as `uucp' and `news' from using FTP.
-
-A9) What's the `POSIX 1003.2 standard'?
-
-POSIX is a name originally coined by Richard Stallman for a
-family of open system standards based on UNIX. There are a
-number of aspects of UNIX under consideration for
-standardization, from the basic system services at the system
-call and C library level to applications and tools to system
-administration and management. Each area of standardization is
-assigned to a working group in the 1003 series.
-
-The POSIX Shell and Utilities standard has been developed by IEEE
-Working Group 1003.2 (POSIX.2). It concentrates on the command
-interpreter interface and utility programs commonly executed from
-the command line or by other programs. An initial version of the
-standard has been approved and published by the IEEE, and work is
-currently underway to update it.
-
-Bash is concerned with the aspects of the shell's behavior
-defined by POSIX.2. The shell command language has of course
-been standardized, including the basic flow control and program
-execution constructs, I/O redirection and pipelining, argument
-handling, variable expansion, and quoting.
-
-The `special' builtins, which must be implemented as part of the
-shell to provide the desired functionality, are specified as
-being part of the shell; examples of these are `eval' and
-`export'. Other utilities appear in the sections of POSIX.2 not
-devoted to the shell which are commonly (and in some cases must
-be) implemented as builtin commands, such as `read' and `test'.
-POSIX.2 also specifies aspects of the shell's interactive
-behavior as part of the UPE, including job control and command
-line editing. Only vi-style line editing commands have been
-standardized; emacs editing commands were left out due to
-objections.
-
-The Open Group has made an older version of its Single Unix
-Specification (version 2), which is very similar to POSIX.2,
-available on the web at
-
-http://www.opengroup.org/onlinepubs/007908799/
-
-The Single Unix Specification, version 3, is available on the web at
-
-http://www.opengroup.org/onlinepubs/007904975/
-
-A10) What is the bash `posix mode'?
-
-Although bash is an implementation of the POSIX.2 shell
-specification, there are areas where the bash default behavior
-differs from that spec. The bash `posix mode' changes the bash
-behavior in these areas so that it obeys the spec more closely.
-
-Posix mode is entered by starting bash with the --posix or
-'-o posix' option or executing `set -o posix' after bash is running.
-
-The specific aspects of bash which change when posix mode is
-active are listed in the file POSIX in the bash distribution.
-They are also listed in a section in the Bash Reference Manual
-(from which that file is generated).
-
-Section B: The latest version
-
-B1) What's new in version 2.05b?
-
-The raison d'etre for bash-2.05b is to make a second intermediate
-release containing the first of the new features to be available
-in bash-3.0 and get feedback on those features before proceeding.
-The major new feature is multibyte character support in both Bash
-and Readline.
-
-Bash-2.05b contains the following new features (see the manual page for
-complete descriptions and the CHANGES and NEWS files in the bash-2.05b
-distribution):
-
-o support for multibyte characters has been added to both bash and readline
-
-o the DEBUG trap is now run *before* simple commands, ((...)) commands,
- [[...]] conditional commands, and for ((...)) loops
-
-o the shell now performs arithmetic in the largest integer size the machine
- supports (intmax_t)
-
-o there is a new \D{...} prompt expansion; passes the `...' to strftime(3)
- and inserts the result into the expanded prompt
-
-o there is a new `here-string' redirection operator: <<< word
-
-o when displaying variables, function attributes and definitions are shown
- separately, allowing them to be re-used as input (attempting to re-use
- the old output would result in syntax errors).
-
-o `read' has a new `-u fd' option to read from a specified file descriptor
-
-o the bash debugger in examples/bashdb has been modified to work with the
- new DEBUG trap semantics, the command set has been made more gdb-like,
- and the changes to $LINENO make debugging functions work better
-
-o the expansion of $LINENO inside a shell function is only relative to the
- function start if the shell is interactive -- if the shell is running a
- script, $LINENO expands to the line number in the script. This is as
- POSIX-2001 requires
-
-
-A short feature history dating from Bash-2.0:
-
-Bash-2.05a introduced the following new features:
-
-o The `printf' builtin has undergone major work
-
-o There is a new read-only `shopt' option: login_shell, which is set by
- login shells and unset otherwise
-
-o New `\A' prompt string escape sequence; expanding to time in 24-hour
- HH:MM format
-
-o New `-A group/-g' option to complete and compgen; goes group name
- completion
-
-o New [+-]O invocation option to set and unset `shopt' options at startup
-
-o ksh-like `ERR' trap
-
-o `for' loops now allow empty word lists after the `in' reserved word
-
-o new `hard' and `soft' arguments for the `ulimit' builtin
-
-o Readline can be configured to place the user at the same point on the line
- when retrieving commands from the history list
-
-o Readline can be configured to skip `hidden' files (filenames with a leading
- `.' on Unix) when performing completion
-
-Bash-2.05 introduced the following new features:
-
-o This version has once again reverted to using locales and strcoll(3) when
- processing pattern matching bracket expressions, as POSIX requires.
-o Added a new `--init-file' invocation argument as a synonym for `--rcfile',
- per the new GNU coding standards.
-o The /dev/tcp and /dev/udp redirections now accept service names as well as
- port numbers.
-o `complete' and `compgen' now take a `-o value' option, which controls some
- of the aspects of that compspec. Valid values are:
-
- default - perform bash default completion if programmable
- completion produces no matches
- dirnames - perform directory name completion if programmable
- completion produces no matches
- filenames - tell readline that the compspec produces filenames,
- so it can do things like append slashes to
- directory names and suppress trailing spaces
-o A new loadable builtin, realpath, which canonicalizes and expands symlinks
- in pathname arguments.
-o When `set' is called without options, it prints function defintions in a
- way that allows them to be reused as input. This affects `declare' and
- `declare -p' as well. This only happens when the shell is not in POSIX
- mode, since POSIX.2 forbids this behavior.
-
-Bash-2.04 introduced the following new features:
-
-o Programmable word completion with the new `complete' and `compgen' builtins;
- examples are provided in examples/complete/complete-examples
-o `history' has a new `-d' option to delete a history entry
-o `bind' has a new `-x' option to bind key sequences to shell commands
-o The prompt expansion code has new `\j' and `\l' escape sequences
-o The `no_empty_cmd_completion' shell option, if enabled, inhibits
- command completion when TAB is typed on an empty line
-o `help' has a new `-s' option to print a usage synopsis
-o New arithmetic operators: var++, var--, ++var, --var, expr1,expr2 (comma)
-o New ksh93-style arithmetic for command:
- for ((expr1 ; expr2; expr3 )); do list; done
-o `read' has new options: `-t', `-n', `-d', `-s'
-o The redirection code handles several filenames specially: /dev/fd/N,
- /dev/stdin, /dev/stdout, /dev/stderr
-o The redirection code now recognizes /dev/tcp/HOST/PORT and
- /dev/udp/HOST/PORT and tries to open a TCP or UDP socket, respectively,
- to the specified port on the specified host
-o The ${!prefix*} expansion has been implemented
-o A new FUNCNAME variable, which expands to the name of a currently-executing
- function
-o The GROUPS variable is no longer readonly
-o A new shopt `xpg_echo' variable, to control the behavior of echo with
- respect to backslash-escape sequences at runtime
-o The NON_INTERACTIVE_LOGIN_SHELLS #define has returned
-
-The version of Readline released with Bash-2.04, Readline-4.1, had several
-new features as well:
-
-o Parentheses matching is always compiled into readline, and controllable
- with the new `blink-matching-paren' variable
-o The history-search-forward and history-search-backward functions now leave
- point at the end of the line when the search string is empty, like
- reverse-search-history, and forward-search-history
-o A new function for applications: rl_on_new_line_with_prompt()
-o New variables for applications: rl_already_prompted, and rl_gnu_readline_p
-
-
-Bash-2.03 had very few new features, in keeping with the convention
-that odd-numbered releases provide mainly bug fixes. A number of new
-features were added to Readline, mostly at the request of the Cygnus
-folks.
-
-A new shopt option, `restricted_shell', so that startup files can test
- whether or not the shell was started in restricted mode
-Filename generation is now performed on the words between ( and ) in
- compound array assignments (this is really a bug fix)
-OLDPWD is now auto-exported, as POSIX.2 requires
-ENV and BASH_ENV are read-only variables in a restricted shell
-Bash may now be linked against an already-installed Readline library,
- as long as the Readline library is version 4 or newer
-All shells begun with the `--login' option will source the login shell
- startup files, even if the shell is not interactive
-
-There were lots of changes to the version of the Readline library released
-along with Bash-2.03. For a complete list of the changes, read the file
-CHANGES in the Bash-2.03 distribution.
-
-Bash-2.02 contained the following new features:
-
-a new version of malloc (based on the old GNU malloc code in previous
- bash versions) that is more page-oriented, more conservative
- with memory usage, does not `orphan' large blocks when they
- are freed, is usable on 64-bit machines, and has allocation
- checking turned on unconditionally
-POSIX.2-style globbing character classes ([:alpha:], [:alnum:], etc.)
-POSIX.2-style globbing equivalence classes
-POSIX.2-style globbing collating symbols
-the ksh [[...]] extended conditional command
-the ksh egrep-style extended pattern matching operators
-a new `printf' builtin
-the ksh-like $(<filename) command substitution, which is equivalent to
- $(cat filename)
-new tilde prefixes that expand to directories from the directory stack
-new `**' arithmetic operator to do exponentiation
-case-insensitive globbing (filename expansion)
-menu completion a la tcsh
-`magic-space' history expansion function like tcsh
-the readline inputrc `language' has a new file inclusion directive ($include)
-
-Bash-2.01 contained only a few new features:
-
-new `GROUPS' builtin array variable containing the user's group list
-new bindable readline commands: history-and-alias-expand-line and
- alias-expand-line
-
-Bash-2.0 contained extensive changes and new features from bash-1.14.7.
-Here's a short list:
-
-new `time' reserved word to time pipelines, shell builtins, and
- shell functions
-one-dimensional arrays with a new compound assignment statement,
- appropriate expansion constructs and modifications to some
- of the builtins (read, declare, etc.) to use them
-new quoting syntaxes for ANSI-C string expansion and locale-specific
- string translation
-new expansions to do substring extraction, pattern replacement, and
- indirect variable expansion
-new builtins: `disown' and `shopt'
-new variables: HISTIGNORE, SHELLOPTS, PIPESTATUS, DIRSTACK, GLOBIGNORE,
- MACHTYPE, BASH_VERSINFO
-special handling of many unused or redundant variables removed
- (e.g., $notify, $glob_dot_filenames, $no_exit_on_failed_exec)
-dynamic loading of new builtin commands; many loadable examples provided
-new prompt expansions: \a, \e, \n, \H, \T, \@, \v, \V
-history and aliases available in shell scripts
-new readline variables: enable-keypad, mark-directories, input-meta,
- visible-stats, disable-completion, comment-begin
-new readline commands to manipulate the mark and operate on the region
-new readline emacs mode commands and bindings for ksh-88 compatibility
-updated and extended builtins
-new DEBUG trap
-expanded (and now documented) restricted shell mode
-
-implementation stuff:
-autoconf-based configuration
-nearly all of the bugs reported since version 1.14 have been fixed
-most builtins converted to use builtin `getopt' for consistency
-most builtins use -p option to display output in a reusable form
- (for consistency)
-grammar tighter and smaller (66 reduce-reduce conflicts gone)
-lots of code now smaller and faster
-test suite greatly expanded
-
-B2) Are there any user-visible incompatibilities between bash-2.05b and
- bash-1.14.7?
-
-There are a few incompatibilities between version 1.14.7 and version 2.05b.
-They are detailed in the file COMPAT in the bash distribution. That file
-is not meant to be all-encompassing; send mail to bash-maintainers@gnu.org
-if if you find something that's not mentioned there.
-
-Section C: Differences from other Unix shells
-
-C1) How does bash differ from sh, the Bourne shell?
-
-This is a non-comprehensive list of features that differentiate bash
-from the SVR4.2 shell. The bash manual page explains these more
-completely.
-
-Things bash has that sh does not:
- long invocation options
- [+-]O invocation option
- -l invocation option
- `!' reserved word to invert pipeline return value
- `time' reserved word to time pipelines and shell builtins
- the `function' reserved word
- the `select' compound command and reserved word
- arithmetic for command: for ((expr1 ; expr2; expr3 )); do list; done
- new $'...' and $"..." quoting
- the $(...) form of command substitution
- the $(<filename) form of command substitution, equivalent to
- $(cat filename)
- the ${#param} parameter value length operator
- the ${!param} indirect parameter expansion operator
- the ${!param*} prefix expansion operator
- the ${param:offset[:length]} parameter substring operator
- the ${param/pat[/string]} parameter pattern substitution operator
- expansions to perform substring removal (${p%[%]w}, ${p#[#]w})
- expansion of positional parameters beyond $9 with ${num}
- variables: BASH, BASH_VERSION, BASH_VERSINFO, UID, EUID, REPLY,
- TIMEFORMAT, PPID, PWD, OLDPWD, SHLVL, RANDOM, SECONDS,
- LINENO, HISTCMD, HOSTTYPE, OSTYPE, MACHTYPE, HOSTNAME,
- ENV, PS3, PS4, DIRSTACK, PIPESTATUS, HISTSIZE, HISTFILE,
- HISTFILESIZE, HISTCONTROL, HISTIGNORE, GLOBIGNORE, GROUPS,
- PROMPT_COMMAND, FCEDIT, FIGNORE, IGNOREEOF, INPUTRC,
- SHELLOPTS, OPTERR, HOSTFILE, TMOUT, FUNCNAME, histchars,
- auto_resume
- DEBUG trap
- ERR trap
- variable arrays with new compound assignment syntax
- redirections: <>, &>, >|, <<<, [n]<&word-, [n]>&word-
- prompt string special char translation and variable expansion
- auto-export of variables in initial environment
- command search finds functions before builtins
- bash return builtin will exit a file sourced with `.'
- builtins: cd -/-L/-P, exec -l/-c/-a, echo -e/-E, hash -d/-l/-p/-t.
- export -n/-f/-p/name=value, pwd -L/-P,
- read -e/-p/-a/-t/-n/-d/-s/-u,
- readonly -a/-f/name=value, trap -l, set +o,
- set -b/-m/-o option/-h/-p/-B/-C/-H/-P,
- unset -f/-v, ulimit -m/-p/-u,
- type -a/-p/-t/-f/-P, suspend -f, kill -n,
- test -o optname/s1 == s2/s1 < s2/s1 > s2/-nt/-ot/-ef/-O/-G/-S
- bash reads ~/.bashrc for interactive shells, $ENV for non-interactive
- bash restricted shell mode is more extensive
- bash allows functions and variables with the same name
- brace expansion
- tilde expansion
- arithmetic expansion with $((...)) and `let' builtin
- the `[[...]]' extended conditional command
- process substitution
- aliases and alias/unalias builtins
- local variables in functions and `local' builtin
- readline and command-line editing with programmable completion
- command history and history/fc builtins
- csh-like history expansion
- other new bash builtins: bind, command, compgen, complete, builtin,
- declare/typeset, dirs, enable, fc, help,
- history, logout, popd, pushd, disown, shopt,
- printf
- exported functions
- filename generation when using output redirection (command >a*)
- POSIX.2-style globbing character classes
- POSIX.2-style globbing equivalence classes
- POSIX.2-style globbing collating symbols
- egrep-like extended pattern matching operators
- case-insensitive pattern matching and globbing
- variable assignments preceding commands affect only that command,
- even for builtins and functions
- posix mode
- redirection to /dev/fd/N, /dev/stdin, /dev/stdout, /dev/stderr,
- /dev/tcp/host/port, /dev/udp/host/port
-
-Things sh has that bash does not:
- uses variable SHACCT to do shell accounting
- includes `stop' builtin (bash can use alias stop='kill -s STOP')
- `newgrp' builtin
- turns on job control if called as `jsh'
- $TIMEOUT (like bash $TMOUT)
- `^' is a synonym for `|'
- new SVR4.2 sh builtins: mldmode, priv
-
-Implementation differences:
- redirection to/from compound commands causes sh to create a subshell
- bash does not allow unbalanced quotes; sh silently inserts them at EOF
- bash does not mess with signal 11
- sh sets (euid, egid) to (uid, gid) if -p not supplied and uid < 100
- bash splits only the results of expansions on IFS, using POSIX.2
- field splitting rules; sh splits all words on IFS
- sh does not allow MAILCHECK to be unset (?)
- sh does not allow traps on SIGALRM or SIGCHLD
- bash allows multiple option arguments when invoked (e.g. -x -v);
- sh allows only a single option argument (`sh -x -v' attempts
- to open a file named `-v', and, on SunOS 4.1.4, dumps core.
- On Solaris 2.4 and earlier versions, sh goes into an infinite
- loop.)
- sh exits a script if any builtin fails; bash exits only if one of
- the POSIX.2 `special' builtins fails
-
-C2) How does bash differ from the Korn shell, version ksh88?
-
-Things bash has or uses that ksh88 does not:
- long invocation options
- [-+]O invocation option
- -l invocation option
- `!' reserved word
- arithmetic for command: for ((expr1 ; expr2; expr3 )); do list; done
- arithmetic in largest machine-supported size (intmax_t)
- posix mode and posix conformance
- command hashing
- tilde expansion for assignment statements that look like $PATH
- process substitution with named pipes if /dev/fd is not available
- the ${!param} indirect parameter expansion operator
- the ${!param*} prefix expansion operator
- the ${param:offset[:length]} parameter substring operator
- the ${param/pat[/string]} parameter pattern substitution operator
- variables: BASH, BASH_VERSION, BASH_VERSINFO, UID, EUID, SHLVL,
- TIMEFORMAT, HISTCMD, HOSTTYPE, OSTYPE, MACHTYPE,
- HISTFILESIZE, HISTIGNORE, HISTCONTROL, PROMPT_COMMAND,
- IGNOREEOF, FIGNORE, INPUTRC, HOSTFILE, DIRSTACK,
- PIPESTATUS, HOSTNAME, OPTERR, SHELLOPTS, GLOBIGNORE,
- GROUPS, FUNCNAME, histchars, auto_resume
- prompt expansion with backslash escapes and command substitution
- redirection: &> (stdout and stderr), <<<, [n]<&word-, [n]>&word-
- more extensive and extensible editing and programmable completion
- builtins: bind, builtin, command, declare, dirs, echo -e/-E, enable,
- exec -l/-c/-a, fc -s, export -n/-f/-p, hash, help, history,
- jobs -x/-r/-s, kill -s/-n/-l, local, logout, popd, pushd,
- read -e/-p/-a/-t/-n/-d/-s, readonly -a/-n/-f/-p,
- set -o braceexpand/-o histexpand/-o interactive-comments/
- -o notify/-o physical/-o posix/-o hashall/-o onecmd/
- -h/-B/-C/-b/-H/-P, set +o, suspend, trap -l, type,
- typeset -a/-F/-p, ulimit -u, umask -S, alias -p, shopt,
- disown, printf, complete, compgen
- `!' csh-style history expansion
- POSIX.2-style globbing character classes
- POSIX.2-style globbing equivalence classes
- POSIX.2-style globbing collating symbols
- egrep-like extended pattern matching operators
- case-insensitive pattern matching and globbing
- `**' arithmetic operator to do exponentiation
- redirection to /dev/fd/N, /dev/stdin, /dev/stdout, /dev/stderr
- arrays of unlimited size
- TMOUT is default timeout for `read' and `select'
-
-Things ksh88 has or uses that bash does not:
- tracked aliases (alias -t)
- variables: ERRNO, FPATH, EDITOR, VISUAL
- co-processes (|&, >&p, <&p)
- weirdly-scoped functions
- typeset +f to list all function names without definitions
- text of command history kept in a file, not memory
- builtins: alias -x, cd old new, fc -e -, newgrp, print,
- read -p/-s/var?prompt, set -A/-o gmacs/
- -o bgnice/-o markdirs/-o nolog/-o trackall/-o viraw/-s,
- typeset -H/-L/-R/-Z/-A/-ft/-fu/-fx/-l/-u/-t, whence
- using environment to pass attributes of exported variables
- arithmetic evaluation done on arguments to some builtins
- reads .profile from $PWD when invoked as login shell
-
-Implementation differences:
- ksh runs last command of a pipeline in parent shell context
- bash has brace expansion by default (ksh88 compile-time option)
- bash has fixed startup file for all interactive shells; ksh reads $ENV
- bash has exported functions
- bash command search finds functions before builtins
- bash waits for all commands in pipeline to exit before returning status
- emacs-mode editing has some slightly different key bindings
-
-C3) Which new features in ksh-93 are not in bash, and which are?
-
-New things in ksh-93 not in bash-2.05b:
- associative arrays
- floating point arithmetic and variables
- math library functions
- ${!name[sub]} name of subscript for associative array
- `.' is allowed in variable names to create a hierarchical namespace
- more extensive compound assignment syntax
- discipline functions
- `sleep' and `getconf' builtins (bash has loadable versions)
- typeset -n and `nameref' variables
- KEYBD trap
- variables: .sh.edchar, .sh.edmode, .sh.edcol, .sh.edtext, .sh.version,
- .sh.name, .sh.subscript, .sh.value, .sh.match, HISTEDIT
- backreferences in pattern matching (\N)
- `&' operator in pattern lists for matching
- print -f (bash uses printf)
- `fc' has been renamed to `hist'
- `.' can execute shell functions
- exit statuses between 0 and 255
- set -o pipefail
- `+=' variable assignment operator
- FPATH and PATH mixing
- getopts -a
- -I invocation option
- DEBUG trap now executed before each simple command, instead of after
- printf %H, %P, %T, %Z modifiers, output base for %d
- lexical scoping for local variables in `ksh' functions
- no scoping for local variables in `POSIX' functions
-
-New things in ksh-93 present in bash-2.05b:
- [n]<&word- and [n]>&word- redirections (combination dup and close)
- for (( expr1; expr2; expr3 )) ; do list; done - arithmetic for command
- ?:, ++, --, `expr1 , expr2' arithmetic operators
- expansions: ${!param}, ${param:offset[:len]}, ${param/pat[/str]},
- ${!param*}
- compound array assignment
- the `!' reserved word
- loadable builtins -- but ksh uses `builtin' while bash uses `enable'
- `command', `builtin', `disown' builtins
- new $'...' and $"..." quoting
- FIGNORE (but bash uses GLOBIGNORE), HISTCMD
- set -o notify/-C
- changes to kill builtin
- read -A (bash uses read -a)
- read -t/-d
- trap -p
- exec -c/-a
- `.' restores the positional parameters when it completes
- POSIX.2 `test'
- umask -S
- unalias -a
- command and arithmetic substitution performed on PS1, PS4, and ENV
- command name completion
- ENV processed only for interactive shells
-
-Section D: Why does bash do some things differently than other Unix shells?
-
-D1) Why does bash run a different version of `command' than
- `which command' says it will?
-
-On many systems, `which' is actually a csh script that assumes
-you're running csh. In tcsh, `which' and its cousin `where'
-are builtins. On other Unix systems, `which' is a perl script
-that uses the PATH environment variable.
-
-The csh script version reads the csh startup files from your
-home directory and uses those to determine which `command' will
-be invoked. Since bash doesn't use any of those startup files,
-there's a good chance that your bash environment differs from
-your csh environment. The bash `type' builtin does everything
-`which' does, and will report correct results for the running
-shell. If you're really wedded to the name `which', try adding
-the following function definition to your .bashrc:
-
- which()
- {
- builtin type "$@"
- }
-
-If you're moving from tcsh and would like to bring `where' along
-as well, use this function:
-
- where()
- {
- builtin type -a "$@"
- }
-
-D2) Why doesn't bash treat brace expansions exactly like csh?
-
-The only difference between bash and csh brace expansion is that
-bash requires a brace expression to contain at least one unquoted
-comma if it is to be expanded. Any brace-surrounded word not
-containing an unquoted comma is left unchanged by the brace
-expansion code. This affords the greatest degree of sh
-compatibility.
-
-Bash, ksh, zsh, and pd-ksh all implement brace expansion this way.
-
-D3) Why doesn't bash have csh variable modifiers?
-
-Posix has specified a more powerful, albeit somewhat more cryptic,
-mechanism cribbed from ksh, and bash implements it.
-
-${parameter%word}
- Remove smallest suffix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- smallest portion of the suffix matched by the pattern deleted.
-
- x=file.c
- echo ${x%.c}.o
- -->file.o
-
-${parameter%%word}
-
- Remove largest suffix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- largest portion of the suffix matched by the pattern deleted.
-
- x=posix/src/std
- echo ${x%%/*}
- -->posix
-
-${parameter#word}
- Remove smallest prefix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- smallest portion of the prefix matched by the pattern deleted.
-
- x=$HOME/src/cmd
- echo ${x#$HOME}
- -->/src/cmd
-
-${parameter##word}
- Remove largest prefix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- largest portion of the prefix matched by the pattern deleted.
-
- x=/one/two/three
- echo ${x##*/}
- -->three
-
-
-Given
- a=/a/b/c/d
- b=b.xxx
-
- csh bash result
- --- ---- ------
- $a:h ${a%/*} /a/b/c
- $a:t ${a##*/} d
- $b:r ${b%.*} b
- $b:e ${b##*.} xxx
-
-
-D4) How can I make my csh aliases work when I convert to bash?
-
-Bash uses a different syntax to support aliases than csh does.
-The details can be found in the documentation. We have provided
-a shell script which does most of the work of conversion for you;
-this script can be found in ./examples/misc/aliasconv.sh. Here is
-how you use it:
-
-Start csh in the normal way for you. (e.g., `csh')
-
-Pipe the output of `alias' through `aliasconv.sh', saving the
-results into `bash_aliases':
-
- alias | bash aliasconv.sh >bash_aliases
-
-Edit `bash_aliases', carefully reading through any created
-functions. You will need to change the names of some csh specific
-variables to the bash equivalents. The script converts $cwd to
-$PWD, $term to $TERM, $home to $HOME, $user to $USER, and $prompt
-to $PS1. You may also have to add quotes to avoid unwanted
-expansion.
-
-For example, the csh alias:
-
- alias cd 'cd \!*; echo $cwd'
-
-is converted to the bash function:
-
- cd () { command cd "$@"; echo $PWD ; }
-
-The only thing that needs to be done is to quote $PWD:
-
- cd () { command cd "$@"; echo "$PWD" ; }
-
-Merge the edited file into your ~/.bashrc.
-
-There is an additional, more ambitious, script in
-examples/misc/cshtobash that attempts to convert your entire csh
-environment to its bash equivalent. This script can be run as
-simply `cshtobash' to convert your normal interactive
-environment, or as `cshtobash ~/.login' to convert your login
-environment.
-
-D5) How can I pipe standard output and standard error from one command to
- another, like csh does with `|&'?
-
-Use
- command 2>&1 | command2
-
-The key is to remember that piping is performed before redirection, so
-file descriptor 1 points to the pipe when it is duplicated onto file
-descriptor 2.
-
-D6) Now that I've converted from ksh to bash, are there equivalents to
- ksh features like autoloaded functions and the `whence' command?
-
-There are features in ksh-88 and ksh-93 that do not have direct bash
-equivalents. Most, however, can be emulated with very little trouble.
-
-ksh-88 feature Bash equivalent
--------------- ---------------
-compiled-in aliases set up aliases in .bashrc; some ksh aliases are
- bash builtins (hash, history, type)
-coprocesses named pipe pairs (one for read, one for write)
-typeset +f declare -F
-cd, print, whence function substitutes in examples/functions/kshenv
-autoloaded functions examples/functions/autoload is the same as typeset -fu
-read var?prompt read -p prompt var
-
-ksh-93 feature Bash equivalent
--------------- ---------------
-sleep, getconf Bash has loadable versions in examples/loadables
-${.sh.version} $BASH_VERSION
-print -f printf
-hist alias hist=fc
-$HISTEDIT $FCEDIT
-
-Section E: How can I get bash to do certain things, and why does bash do
- things the way it does?
-
-E1) Why is the bash builtin `test' slightly different from /bin/test?
-
-The specific example used here is [ ! x -o x ], which is false.
-
-Bash's builtin `test' implements the Posix.2 spec, which can be
-summarized as follows (the wording is due to David Korn):
-
-Here is the set of rules for processing test arguments.
-
- 0 Args: False
- 1 Arg: True iff argument is not null.
- 2 Args: If first arg is !, True iff second argument is null.
- If first argument is unary, then true if unary test is true
- Otherwise error.
- 3 Args: If second argument is a binary operator, do binary test of $1 $3
- If first argument is !, negate two argument test of $2 $3
- If first argument is `(' and third argument is `)', do the
- one-argument test of the second argument.
- Otherwise error.
- 4 Args: If first argument is !, negate three argument test of $2 $3 $4.
- Otherwise unspecified
- 5 or more Args: unspecified. (Historical shells would use their
- current algorithm).
-
-The operators -a and -o are considered binary operators for the purpose
-of the 3 Arg case.
-
-As you can see, the test becomes (not (x or x)), which is false.
-
-E2) Why does bash sometimes say `Broken pipe'?
-
-If a sequence of commands appears in a pipeline, and one of the
-reading commands finishes before the writer has finished, the
-writer receives a SIGPIPE signal. Many other shells special-case
-SIGPIPE as an exit status in the pipeline and do not report it.
-For example, in:
-
- ps -aux | head
-
-`head' can finish before `ps' writes all of its output, and ps
-will try to write on a pipe without a reader. In that case, bash
-will print `Broken pipe' to stderr when ps is killed by a
-SIGPIPE.
-
-You can build a version of bash that will not report SIGPIPE errors
-by uncommenting the definition of DONT_REPORT_SIGPIPE in the file
-config-top.h.
-
-E3) When I have terminal escape sequences in my prompt, why does bash
- wrap lines at the wrong column?
-
-Readline, the line editing library that bash uses, does not know
-that the terminal escape sequences do not take up space on the
-screen. The redisplay code assumes, unless told otherwise, that
-each character in the prompt is a `printable' character that
-takes up one character position on the screen.
-
-You can use the bash prompt expansion facility (see the PROMPTING
-section in the manual page) to tell readline that sequences of
-characters in the prompt strings take up no screen space.
-
-Use the \[ escape to begin a sequence of non-printing characters,
-and the \] escape to signal the end of such a sequence.
-
-E4) If I pipe the output of a command into `read variable', why doesn't
- the output show up in $variable when the read command finishes?
-
-This has to do with the parent-child relationship between Unix
-processes. It affects all commands run in pipelines, not just
-simple calls to `read'. For example, piping a command's output
-into a `while' loop that repeatedly calls `read' will result in
-the same behavior.
-
-Each element of a pipeline runs in a separate process, a child of
-the shell running the pipeline. A subprocess cannot affect its
-parent's environment. When the `read' command sets the variable
-to the input, that variable is set only in the subshell, not the
-parent shell. When the subshell exits, the value of the variable
-is lost.
-
-Many pipelines that end with `read variable' can be converted
-into command substitutions, which will capture the output of
-a specified command. The output can then be assigned to a
-variable:
-
- grep ^gnu /usr/lib/news/active | wc -l | read ngroup
-
-can be converted into
-
- ngroup=$(grep ^gnu /usr/lib/news/active | wc -l)
-
-This does not, unfortunately, work to split the text among
-multiple variables, as read does when given multiple variable
-arguments. If you need to do this, you can either use the
-command substitution above to read the output into a variable
-and chop up the variable using the bash pattern removal
-expansion operators or use some variant of the following
-approach.
-
-Say /usr/local/bin/ipaddr is the following shell script:
-
-#! /bin/sh
-host `hostname` | awk '/address/ {print $NF}'
-
-Instead of using
-
- /usr/local/bin/ipaddr | read A B C D
-
-to break the local machine's IP address into separate octets, use
-
- OIFS="$IFS"
- IFS=.
- set -- $(/usr/local/bin/ipaddr)
- IFS="$OIFS"
- A="$1" B="$2" C="$3" D="$4"
-
-Beware, however, that this will change the shell's positional
-parameters. If you need them, you should save them before doing
-this.
-
-This is the general approach -- in most cases you will not need to
-set $IFS to a different value.
-
-Some other user-supplied alternatives include:
-
-read A B C D << HERE
- $(IFS=.; echo $(/usr/local/bin/ipaddr))
-HERE
-
-and, where process substitution is available,
-
-read A B C D < <(IFS=.; echo $(/usr/local/bin/ipaddr))
-
-E5) I have a bunch of shell scripts that use backslash-escaped characters
- in arguments to `echo'. Bash doesn't interpret these characters. Why
- not, and how can I make it understand them?
-
-This is the behavior of echo on most Unix System V machines.
-
-The bash builtin `echo' is modeled after the 9th Edition
-Research Unix version of `echo'. It does not interpret
-backslash-escaped characters in its argument strings by default;
-it requires the use of the -e option to enable the
-interpretation. The System V echo provides no way to disable the
-special characters; the bash echo has a -E option to disable
-them.
-
-There is a configuration option that will make bash behave like
-the System V echo and interpret things like `\t' by default. Run
-configure with the --enable-xpg-echo-default option to turn this
-on. Be aware that this will cause some of the tests run when you
-type `make tests' to fail.
-
-There is a shell option, `xpg_echo', settable with `shopt', that will
-change the behavior of echo at runtime. Enabling this option turns
-on expansion of backslash-escape sequences.
-
-E6) Why doesn't a while or for loop get suspended when I type ^Z?
-
-This is a consequence of how job control works on Unix. The only
-thing that can be suspended is the process group. This is a single
-command or pipeline of commands that the shell forks and executes.
-
-When you run a while or for loop, the only thing that the shell forks
-and executes are any commands in the while loop test and commands in
-the loop bodies. These, therefore, are the only things that can be
-suspended when you type ^Z.
-
-If you want to be able to stop the entire loop, you need to put it
-within parentheses, which will force the loop into a subshell that
-may be stopped (and subsequently restarted) as a single unit.
-
-E7) What about empty for loops in Makefiles?
-
-It's fairly common to see constructs like this in automatically-generated
-Makefiles:
-
-SUBDIRS = @SUBDIRS@
-
- ...
-
-subdirs-clean:
- for d in ${SUBDIRS}; do \
- ( cd $$d && ${MAKE} ${MFLAGS} clean ) \
- done
-
-When SUBDIRS is empty, this results in a command like this being passed to
-bash:
-
- for d in ; do
- ( cd $d && ${MAKE} ${MFLAGS} clean )
- done
-
-In versions of bash before bash-2.05a, this was a syntax error. If the
-reserved word `in' was present, a word must follow it before the semicolon
-or newline. The language in the manual page referring to the list of words
-being empty referred to the list after it is expanded. These versions of
-bash required that there be at least one word following the `in' when the
-construct was parsed.
-
-The idiomatic Makefile solution is something like:
-
-SUBDIRS = @SUBDIRS@
-
-subdirs-clean:
- subdirs=$SUBDIRS ; for d in $$subdirs; do \
- ( cd $$d && ${MAKE} ${MFLAGS} clean ) \
- done
-
-The latest drafts of the updated POSIX standard have changed this: the
-word list is no longer required. Bash versions 2.05a and later accept
-the new syntax.
-
-E8) Why does the arithmetic evaluation code complain about `08'?
-
-The bash arithmetic evaluation code (used for `let', $(()), (()), and in
-other places), interprets a leading `0' in numeric constants as denoting
-an octal number, and a leading `0x' as denoting hexadecimal. This is
-in accordance with the POSIX.2 spec, section 2.9.2.1, which states that
-arithmetic constants should be handled as signed long integers as defined
-by the ANSI/ISO C standard.
-
-The POSIX.2 interpretation committee has confirmed this:
-
-http://www.pasc.org/interps/unofficial/db/p1003.2/pasc-1003.2-173.html
-
-E9) Why does the pattern matching expression [A-Z]* match files beginning
- with every letter except `z'?
-
-Bash-2.03, Bash-2.05 and later versions honor the current locale setting
-when processing ranges within pattern matching bracket expressions ([A-Z]).
-This is what POSIX.2 and SUSv3/XPG6 specify.
-
-The behavior of the matcher in bash-2.05 and later versions depends on the
-current LC_COLLATE setting. Setting this variable to `C' or `POSIX' will
-result in the traditional behavior ([A-Z] matches all uppercase ASCII
-characters). Many other locales, including the en_US locale (the default
-on many US versions of Linux) collate the upper and lower case letters like
-this:
-
- AaBb...Zz
-
-which means that [A-Z] matches every letter except `z'. Others collate like
-
- aAbBcC...zZ
-
-which means that [A-Z] matches every letter except `a'.
-
-The portable way to specify upper case letters is [:upper:] instead of
-A-Z; lower case may be specified as [:lower:] instead of a-z.
-
-Look at the manual pages for setlocale(3), strcoll(3), and, if it is
-present, locale(1). If you have locale(1), you can use it to find
-your current locale information even if you do not have any of the
-LC_ variables set.
-
-My advice is to put
-
- export LC_COLLATE=C
-
-into /etc/profile and inspect any shell scripts run from cron for
-constructs like [A-Z]. This will prevent things like
-
- rm [A-Z]*
-
-from removing every file in the current directory except those beginning
-with `z' and still allow individual users to change the collation order.
-Users may put the above command into their own profiles as well, of course.
-
-E10) Why does `cd //' leave $PWD as `//'?
-
-POSIX.2, in its description of `cd', says that *three* or more leading
-slashes may be replaced with a single slash when canonicalizing the
-current working directory.
-
-This is, I presume, for historical compatibility. Certain versions of
-Unix, and early network file systems, used paths of the form
-//hostname/path to access `path' on server `hostname'.
-
-E11) If I resize my xterm while another program is running, why doesn't bash
- notice the change?
-
-This is another issue that deals with job control.
-
-The kernel maintains a notion of a current terminal process group. Members
-of this process group (processes whose process group ID is equal to the
-current terminal process group ID) receive terminal-generated signals like
-SIGWINCH. (For more details, see the JOB CONTROL section of the bash
-man page.)
-
-If a terminal is resized, the kernel sends SIGWINCH to each member of
-the terminal's current process group (the `foreground' process group).
-
-When bash is running with job control enabled, each pipeline (which may be
-a single command) is run in its own process group, different from bash's
-process group. This foreground process group receives the SIGWINCH; bash
-does not. Bash has no way of knowing that the terminal has been resized.
-
-There is a `checkwinsize' option, settable with the `shopt' builtin, that
-will cause bash to check the window size and adjust its idea of the
-terminal's dimensions each time a process stops or exits and returns control
-of the terminal to bash. Enable it with `shopt -s checkwinsize'.
-
-Section F: Things to watch out for on certain Unix versions
-
-F1) Why can't I use command line editing in my `cmdtool'?
-
-The problem is `cmdtool' and bash fighting over the input. When
-scrolling is enabled in a cmdtool window, cmdtool puts the tty in
-`raw mode' to permit command-line editing using the mouse for
-applications that cannot do it themselves. As a result, bash and
-cmdtool each try to read keyboard input immediately, with neither
-getting enough of it to be useful.
-
-This mode also causes cmdtool to not implement many of the
-terminal functions and control sequences appearing in the
-`sun-cmd' termcap entry. For a more complete explanation, see
-that file examples/suncmd.termcap in the bash distribution.
-
-`xterm' is a better choice, and gets along with bash much more
-smoothly.
-
-If you must use cmdtool, you can use the termcap description in
-examples/suncmd.termcap. Set the TERMCAP variable to the terminal
-description contained in that file, i.e.
-
-TERMCAP='Mu|sun-cmd:am:bs:km:pt:li#34:co#80:cl=^L:ce=\E[K:cd=\E[J:rs=\E[s:'
-
-Then export TERMCAP and start a new cmdtool window from that shell.
-The bash command-line editing should behave better in the new
-cmdtool. If this works, you can put the assignment to TERMCAP
-in your bashrc file.
-
-F2) I built bash on Solaris 2. Why do globbing expansions and filename
- completion chop off the first few characters of each filename?
-
-This is the consequence of building bash on SunOS 5 and linking
-with the libraries in /usr/ucblib, but using the definitions
-and structures from files in /usr/include.
-
-The actual conflict is between the dirent structure in
-/usr/include/dirent.h and the struct returned by the version of
-`readdir' in libucb.a (a 4.3-BSD style `struct direct').
-
-Make sure you've got /usr/ccs/bin ahead of /usr/ucb in your $PATH
-when configuring and building bash. This will ensure that you
-use /usr/ccs/bin/cc or acc instead of /usr/ucb/cc and that you
-link with libc before libucb.
-
-If you have installed the Sun C compiler, you may also need to
-put /usr/ccs/bin and /opt/SUNWspro/bin into your $PATH before
-/usr/ucb.
-
-F3) Why does bash dump core after I interrupt username completion or
- `~user' tilde expansion on a machine running NIS?
-
-This is a famous and long-standing bug in the SunOS YP (sorry, NIS)
-client library, which is part of libc.
-
-The YP library code keeps static state -- a pointer into the data
-returned from the server. When YP initializes itself (setpwent),
-it looks at this pointer and calls free on it if it's non-null.
-So far, so good.
-
-If one of the YP functions is interrupted during getpwent (the
-exact function is interpretwithsave()), and returns NULL, the
-pointer is freed without being reset to NULL, and the function
-returns. The next time getpwent is called, it sees that this
-pointer is non-null, calls free, and the bash free() blows up
-because it's being asked to free freed memory.
-
-The traditional Unix mallocs allow memory to be freed multiple
-times; that's probably why this has never been fixed. You can
-run configure with the `--without-gnu-malloc' option to use
-the C library malloc and avoid the problem.
-
-F4) I'm running SVR4.2. Why is the line erased every time I type `@'?
-
-The `@' character is the default `line kill' character in most
-versions of System V, including SVR4.2. You can change this
-character to whatever you want using `stty'. For example, to
-change the line kill character to control-u, type
-
- stty kill ^U
-
-where the `^' and `U' can be two separate characters.
-
-F5) Why does bash report syntax errors when my C News scripts use a
- redirection before a subshell command?
-
-The actual command in question is something like
-
- < file ( command )
-
-According to the grammar given in the POSIX.2 standard, this construct
-is, in fact, a syntax error. Redirections may only precede `simple
-commands'. A subshell construct such as the above is one of the shell's
-`compound commands'. A redirection may only follow a compound command.
-
-This affects the mechanical transformation of commands that use `cat'
-to pipe a file into a command (a favorite Useless-Use-Of-Cat topic on
-comp.unix.shell). While most commands of the form
-
- cat file | command
-
-can be converted to `< file command', shell control structures such as
-loops and subshells require `command < file'.
-
-The file CWRU/sh-redir-hack in the bash-2.05a distribution is an
-(unofficial) patch to parse.y that will modify the grammar to
-support this construct. It will not apply with `patch'; you must
-modify parse.y by hand. Note that if you apply this, you must
-recompile with -DREDIRECTION_HACK. This introduces a large
-number of reduce/reduce conflicts into the shell grammar.
-
-F6) Why can't I use vi-mode editing on Red Hat Linux 6.1?
-
-The short answer is that Red Hat screwed up.
-
-The long answer is that they shipped an /etc/inputrc that only works
-for emacs mode editing, and then screwed all the vi users by setting
-INPUTRC to /etc/inputrc in /etc/profile.
-
-The short fix is to do one of the following: remove or rename
-/etc/inputrc, set INPUTRC=~/.inputrc in ~/.bashrc (or .bash_profile,
-but make sure you export it if you do), remove the assignment to
-INPUTRC from /etc/profile, add
-
- set keymap emacs
-
-to the beginning of /etc/inputrc, or bracket the key bindings in
-/etc/inputrc with these lines
-
- $if mode=emacs
- [...]
- $endif
-
-F7) Why do bash-2.05a and bash-2.05b fail to compile `printf.def' on
- HP/UX 11.x?
-
-HP/UX's support for long double is imperfect at best.
-
-GCC will support it without problems, but the HP C library functions
-like strtold(3) and printf(3) don't actually work with long doubles.
-HP implemented a `long_double' type as a 4-element array of 32-bit
-ints, and that is what the library functions use. The ANSI C
-`long double' type is a 128-bit floating point scalar.
-
-The easiest fix, until HP fixes things up, is to edit the generated
-config.h and #undef the HAVE_LONG_DOUBLE line. After doing that,
-the compilation should complete successfully.
-
-Section G: How can I get bash to do certain common things?
-
-G1) How can I get bash to read and display eight-bit characters?
-
-This is a process requiring several steps.
-
-First, you must ensure that the `physical' data path is a full eight
-bits. For xterms, for example, the `vt100' resources `eightBitInput'
-and `eightBitOutput' should be set to `true'.
-
-Once you have set up an eight-bit path, you must tell the kernel and
-tty driver to leave the eighth bit of characters alone when processing
-keyboard input. Use `stty' to do this:
-
- stty cs8 -istrip -parenb
-
-For old BSD-style systems, you can use
-
- stty pass8
-
-You may also need
-
- stty even odd
-
-Finally, you need to tell readline that you will be inputting and
-displaying eight-bit characters. You use readline variables to do
-this. These variables can be set in your .inputrc or using the bash
-`bind' builtin. Here's an example using `bind':
-
- bash$ bind 'set convert-meta off'
- bash$ bind 'set meta-flag on'
- bash$ bind 'set output-meta on'
-
-The `set' commands between the single quotes may also be placed
-in ~/.inputrc.
-
-G2) How do I write a function `x' to replace builtin command `x', but
- still invoke the command from within the function?
-
-This is why the `command' and `builtin' builtins exist. The
-`command' builtin executes the command supplied as its first
-argument, skipping over any function defined with that name. The
-`builtin' builtin executes the builtin command given as its first
-argument directly.
-
-For example, to write a function to replace `cd' that writes the
-hostname and current directory to an xterm title bar, use
-something like the following:
-
- cd()
- {
- builtin cd "$@" && xtitle "$HOST: $PWD"
- }
-
-This could also be written using `command' instead of `builtin';
-the version above is marginally more efficient.
-
-G3) How can I find the value of a shell variable whose name is the value
- of another shell variable?
-
-Versions of Bash newer than Bash-2.0 support this directly. You can use
-
- ${!var}
-
-For example, the following sequence of commands will echo `z':
-
- var1=var2
- var2=z
- echo ${!var1}
-
-For sh compatibility, use the `eval' builtin. The important
-thing to remember is that `eval' expands the arguments you give
-it again, so you need to quote the parts of the arguments that
-you want `eval' to act on.
-
-For example, this expression prints the value of the last positional
-parameter:
-
- eval echo \"\$\{$#\}\"
-
-The expansion of the quoted portions of this expression will be
-deferred until `eval' runs, while the `$#' will be expanded
-before `eval' is executed. In versions of bash later than bash-2.0,
-
- echo ${!#}
-
-does the same thing.
-
-This is not the same thing as ksh93 `nameref' variables, though the syntax
-is similar. I may add namerefs in a future bash version.
-
-G4) How can I make the bash `time' reserved word print timing output that
- looks like the output from my system's /usr/bin/time?
-
-The bash command timing code looks for a variable `TIMEFORMAT' and
-uses its value as a format string to decide how to display the
-timing statistics.
-
-The value of TIMEFORMAT is a string with `%' escapes expanded in a
-fashion similar in spirit to printf(3). The manual page explains
-the meanings of the escape sequences in the format string.
-
-If TIMEFORMAT is not set, bash acts as if the following assignment had
-been performed:
-
- TIMEFORMAT=$'\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS'
-
-The POSIX.2 default time format (used by `time -p command') is
-
- TIMEFORMAT=$'real %2R\nuser %2U\nsys %2S'
-
-The BSD /usr/bin/time format can be emulated with:
-
- TIMEFORMAT=$'\t%1R real\t%1U user\t%1S sys'
-
-The System V /usr/bin/time format can be emulated with:
-
- TIMEFORMAT=$'\nreal\t%1R\nuser\t%1U\nsys\t%1S'
-
-The ksh format can be emulated with:
-
- TIMEFORMAT=$'\nreal\t%2lR\nuser\t%2lU\nsys\t%2lS'
-
-G5) How do I get the current directory into my prompt?
-
-Bash provides a number of backslash-escape sequences which are expanded
-when the prompt string (PS1 or PS2) is displayed. The full list is in
-the manual page.
-
-The \w expansion gives the full pathname of the current directory, with
-a tilde (`~') substituted for the current value of $HOME. The \W
-expansion gives the basename of the current directory. To put the full
-pathname of the current directory into the path without any tilde
-subsitution, use $PWD. Here are some examples:
-
- PS1='\w$ ' # current directory with tilde
- PS1='\W$ ' # basename of current directory
- PS1='$PWD$ ' # full pathname of current directory
-
-The single quotes are important in the final example to prevent $PWD from
-being expanded when the assignment to PS1 is performed.
-
-G6) How can I rename "*.foo" to "*.bar"?
-
-Use the pattern removal functionality described in D3. The following `for'
-loop will do the trick:
-
- for f in *.foo; do
- mv $f ${f%foo}bar
- done
-
-G7) How can I translate a filename from uppercase to lowercase?
-
-The script examples/functions/lowercase, originally written by John DuBois,
-will do the trick. The converse is left as an exercise.
-
-G8) How can I write a filename expansion (globbing) pattern that will match
- all files in the current directory except "." and ".."?
-
-You must have set the `extglob' shell option using `shopt -s extglob' to use
-this:
-
- echo .!(.|) *
-
-A solution that works without extended globbing is given in the Unix Shell
-FAQ, posted periodically to comp.unix.shell.
-
-Section H: Where do I go from here?
-
-H1) How do I report bugs in bash, and where should I look for fixes and
- advice?
-
-Use the `bashbug' script to report bugs. It is built and
-installed at the same time as bash. It provides a standard
-template for reporting a problem and automatically includes
-information about your configuration and build environment.
-
-`bashbug' sends its reports to bug-bash@gnu.org, which
-is a large mailing list gatewayed to the usenet newsgroup gnu.bash.bug.
-
-Bug fixes, answers to questions, and announcements of new releases
-are all posted to gnu.bash.bug. Discussions concerning bash features
-and problems also take place there.
-
-To reach the bash maintainers directly, send mail to
-bash-maintainers@gnu.org.
-
-H2) What kind of bash documentation is there?
-
-First, look in the doc directory in the bash distribution. It should
-contain at least the following files:
-
-bash.1 an extensive, thorough Unix-style manual page
-builtins.1 a manual page covering just bash builtin commands
-bashref.texi a reference manual in GNU tex`info format
-bashref.info an info version of the reference manual
-FAQ this file
-article.ms text of an article written for The Linux Journal
-readline.3 a man page describing readline
-
-Postscript, HTML, and ASCII files created from the above source are
-available in the documentation distribution.
-
-There is additional documentation available for anonymous FTP from host
-ftp.cwru.edu in the `pub/bash' directory.
-
-Cameron Newham and Bill Rosenblatt have written a book on bash, published
-by O'Reilly and Associates. The book is based on Bill Rosenblatt's Korn
-Shell book. The title is ``Learning the Bash Shell'', and the ISBN number
-is 1-56592-147-X. Look for it in fine bookstores near you. This book
-covers bash-1.14, but has an appendix describing some of the new features
-in bash-2.0.
-
-A second edition of this book is available, published in January, 1998.
-The ISBN number is 1-56592-347-2. Look for it in the same fine bookstores
-or on the web.
-
-The GNU Bash Reference Manual has been published as a printed book by
-Network Theory Ltd (Paperback, ISBN: 0-9541617-7-7, Feb 2003). It covers
-bash-2.0 and is available from most online bookstores (see
-http://www.network-theory.co.uk/bash/manual/ for details). The publisher
-will donate $1 to the Free Software Foundation for each copy sold.
-
-H3) What's coming in future versions?
-
-These are features I hope to include in a future version of bash.
-
-a better bash debugger (a minimally-tested version is included with bash-2.05b)
-associative arrays
-co-processes, but with a new-style syntax that looks like function declaration
-
-H4) What's on the bash `wish list' for future versions?
-
-These are features that may or may not appear in a future version of bash.
-
-breaking some of the shell functionality into embeddable libraries
-a module system like zsh's, using dynamic loading like builtins
-better internationalization using GNU `gettext'
-date-stamped command history
-a bash programmer's guide with a chapter on creating loadable builtins
-a better loadable interface to perl with access to the shell builtins and
- variables (contributions gratefully accepted)
-ksh93-like `nameref' variables
-ksh93-like `+=' variable assignment operator
-ksh93-like `xx.yy' variables (including some of the .sh.* variables) and
- associated disipline functions
-Some of the new ksh93 pattern matching operators, like backreferencing
-
-H5) When will the next release appear?
-
-The next version will appear sometime in 2002. Never make predictions.
-
-
-This document is Copyright 1995-2003 by Chester Ramey.
-
-Permission is hereby granted, without written agreement and
-without license or royalty fees, to use, copy, and distribute
-this document for any purpose, provided that the above copyright
-notice appears in all copies of this document and that the
-contents of this document remain unaltered.
+++ /dev/null
-/* eval.c -- reading and evaluating commands. */
-
-/* Copyright (C) 1996-2011 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (HAVE_UNISTD_H)
-# ifdef _MINIX
-# include <sys/types.h>
-# endif
-# include <unistd.h>
-#endif
-
-#include "bashansi.h"
-#include <stdio.h>
-
-#include "bashintl.h"
-
-
-#include "shell.h"
-#include "flags.h"
-#include "trap.h"
-
-#include "builtins/common.h"
-
-#include "input.h"
-#include "execute_cmd.h"
-
-#if defined (HISTORY)
-# include "bashhist.h"
-#endif
-
-extern int EOF_reached;
-extern int indirection_level;
-extern int posixly_correct;
-extern int subshell_environment, running_under_emacs;
-extern int last_command_exit_value, stdin_redir;
-extern int need_here_doc;
-extern int current_command_number, current_command_line_count, line_number;
-extern int expand_aliases;
-
-#if defined (HAVE_POSIX_SIGNALS)
-extern sigset_t top_level_mask;
-#endif
-
-static void send_pwd_to_eterm __P((void));
-static sighandler alrm_catcher __P((int));
-
-/* Read and execute commands until EOF is reached. This assumes that
- the input source has already been initialized. */
-int
-reader_loop ()
-{
- int our_indirection_level;
- COMMAND * volatile current_command;
-
- USE_VAR(current_command);
-
- current_command = (COMMAND *)NULL;
-
- our_indirection_level = ++indirection_level;
-
- while (EOF_Reached == 0)
- {
- int code;
-
- code = setjmp_nosigs (top_level);
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- /* XXX - why do we set this every time through the loop? */
- if (interactive_shell && signal_is_ignored (SIGINT) == 0)
- set_signal_handler (SIGINT, sigint_sighandler);
-
- if (code != NOT_JUMPED)
- {
- indirection_level = our_indirection_level;
-
- switch (code)
- {
- /* Some kind of throw to top_level has occured. */
- case FORCE_EOF:
- case ERREXIT:
- case EXITPROG:
- current_command = (COMMAND *)NULL;
- if (exit_immediately_on_error)
- variable_context = 0; /* not in a function */
- EOF_Reached = EOF;
- goto exec_done;
-
- case DISCARD:
- /* Make sure the exit status is reset to a non-zero value, but
- leave existing non-zero values (e.g., > 128 on signal)
- alone. */
- if (last_command_exit_value == 0)
- last_command_exit_value = EXECUTION_FAILURE;
- if (subshell_environment)
- {
- current_command = (COMMAND *)NULL;
- EOF_Reached = EOF;
- goto exec_done;
- }
- /* Obstack free command elements, etc. */
- if (current_command)
- {
- dispose_command (current_command);
- current_command = (COMMAND *)NULL;
- }
-#if defined (HAVE_POSIX_SIGNALS)
- sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
-#endif
- break;
-
- default:
- command_error ("reader_loop", CMDERR_BADJUMP, code, 0);
- }
- }
-
- executing = 0;
- if (temporary_env)
- dispose_used_env_vars ();
-
-#if (defined (ultrix) && defined (mips)) || defined (C_ALLOCA)
- /* Attempt to reclaim memory allocated with alloca (). */
- (void) alloca (0);
-#endif
-
- if (read_command () == 0)
- {
- if (interactive_shell == 0 && read_but_dont_execute)
- {
- last_command_exit_value = EXECUTION_SUCCESS;
- dispose_command (global_command);
- global_command = (COMMAND *)NULL;
- }
- else if (current_command = global_command)
- {
- global_command = (COMMAND *)NULL;
- current_command_number++;
-
- executing = 1;
- stdin_redir = 0;
- execute_command (current_command);
-
- exec_done:
- QUIT;
-
- if (current_command)
- {
- dispose_command (current_command);
- current_command = (COMMAND *)NULL;
- }
- }
- }
- else
- {
- /* Parse error, maybe discard rest of stream if not interactive. */
- if (interactive == 0)
- EOF_Reached = EOF;
- }
- if (just_one_command)
- EOF_Reached = EOF;
- }
- indirection_level--;
- return (last_command_exit_value);
-}
-
-static sighandler
-alrm_catcher(i)
- int i;
-{
- printf (_("\007timed out waiting for input: auto-logout\n"));
- fflush (stdout);
- bash_logout (); /* run ~/.bash_logout if this is a login shell */
- jump_to_top_level (EXITPROG);
- SIGRETURN (0);
-}
-
-/* Send an escape sequence to emacs term mode to tell it the
- current working directory. */
-static void
-send_pwd_to_eterm ()
-{
- char *pwd, *f;
-
- f = 0;
- pwd = get_string_value ("PWD");
- if (pwd == 0)
- f = pwd = get_working_directory ("eterm");
- fprintf (stderr, "\032/%s\n", pwd);
- free (f);
-}
-
-/* Call the YACC-generated parser and return the status of the parse.
- Input is read from the current input stream (bash_input). yyparse
- leaves the parsed command in the global variable GLOBAL_COMMAND.
- This is where PROMPT_COMMAND is executed. */
-int
-parse_command ()
-{
- int r;
- char *command_to_execute;
-
- need_here_doc = 0;
- run_pending_traps ();
-
- /* Allow the execution of a random command just before the printing
- of each primary prompt. If the shell variable PROMPT_COMMAND
- is set then the value of it is the command to execute. */
- if (interactive && bash_input.type != st_string)
- {
- command_to_execute = get_string_value ("PROMPT_COMMAND");
- if (command_to_execute)
- execute_variable_command (command_to_execute, "PROMPT_COMMAND");
-
- if (running_under_emacs == 2)
- send_pwd_to_eterm (); /* Yuck */
- }
-
- current_command_line_count = 0;
- r = yyparse ();
-
- if (need_here_doc)
- gather_here_documents ();
-
- return (r);
-}
-
-/* Read and parse a command, returning the status of the parse. The command
- is left in the globval variable GLOBAL_COMMAND for use by reader_loop.
- This is where the shell timeout code is executed. */
-int
-read_command ()
-{
- SHELL_VAR *tmout_var;
- int tmout_len, result;
- SigHandler *old_alrm;
-
- set_current_prompt_level (1);
- global_command = (COMMAND *)NULL;
-
- /* Only do timeouts if interactive. */
- tmout_var = (SHELL_VAR *)NULL;
- tmout_len = 0;
- old_alrm = (SigHandler *)NULL;
-
- if (interactive)
- {
- tmout_var = find_variable ("TMOUT");
-
- if (tmout_var && var_isset (tmout_var))
- {
- tmout_len = atoi (value_cell (tmout_var));
- if (tmout_len > 0)
- {
- old_alrm = set_signal_handler (SIGALRM, alrm_catcher);
- alarm (tmout_len);
- }
- }
- }
-
- QUIT;
-
- current_command_line_count = 0;
- result = parse_command ();
-
- if (interactive && tmout_var && (tmout_len > 0))
- {
- alarm(0);
- set_signal_handler (SIGALRM, old_alrm);
- }
-
- return (result);
-}
+++ /dev/null
-#
-# Simple makefile for the sample loadable builtins
-#
-# Copyright (C) 1996 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
-
-# Include some boilerplate Gnu makefile definitions.
-prefix = @prefix@
-
-exec_prefix = @exec_prefix@
-bindir = @bindir@
-libdir = @libdir@
-infodir = @infodir@
-includedir = @includedir@
-
-topdir = @top_srcdir@
-BUILD_DIR = @BUILD_DIR@
-srcdir = @srcdir@
-VPATH = .:@srcdir@
-
-@SET_MAKE@
-CC = @CC@
-RM = rm -f
-
-SHELL = @MAKE_SHELL@
-
-host_os = @host_os@
-host_cpu = @host_cpu@
-host_vendor = @host_vendor@
-
-CFLAGS = @CFLAGS@
-LOCAL_CFLAGS = @LOCAL_CFLAGS@
-DEFS = @DEFS@
-LOCAL_DEFS = @LOCAL_DEFS@
-
-CPPFLAGS = @CPPFLAGS@
-
-BASHINCDIR = ${topdir}/include
-
-LIBBUILD = ${BUILD_DIR}/lib
-
-INTL_LIBSRC = ${topdir}/lib/intl
-INTL_BUILDDIR = ${LIBBUILD}/intl
-INTL_INC = @INTL_INC@
-LIBINTL_H = @LIBINTL_H@
-
-CCFLAGS = $(DEFS) $(LOCAL_DEFS) $(LOCAL_CFLAGS) $(CFLAGS)
-
-#
-# These values are generated for configure by ${topdir}/support/shobj-conf.
-# If your system is not supported by that script, but includes facilities for
-# dynamic loading of shared objects, please update the script and send the
-# changes to bash-maintainers@gnu.org.
-#
-SHOBJ_CC = @SHOBJ_CC@
-SHOBJ_CFLAGS = @SHOBJ_CFLAGS@
-SHOBJ_LD = @SHOBJ_LD@
-SHOBJ_LDFLAGS = @SHOBJ_LDFLAGS@
-SHOBJ_XLDFLAGS = @SHOBJ_XLDFLAGS@
-SHOBJ_LIBS = @SHOBJ_LIBS@
-SHOBJ_STATUS = @SHOBJ_STATUS@
-
-INC = -I. -I.. -I$(topdir) -I$(topdir)/lib -I$(topdir)/builtins \
- -I$(BASHINCDIR) -I$(BUILD_DIR) -I$(LIBBUILD) \
- -I$(BUILD_DIR)/builtins $(INTL_INC)
-
-.c.o:
- $(SHOBJ_CC) $(SHOBJ_CFLAGS) $(CCFLAGS) $(INC) -c -o $@ $<
-
-
-ALLPROG = print truefalse sleep pushd finfo logname basename dirname \
- tty pathchk tee head mkdir rmdir printenv id whoami \
- uname sync push ln unlink cut realpath getconf strftime
-OTHERPROG = necho hello cat
-
-all: $(SHOBJ_STATUS)
-
-supported: $(ALLPROG)
-others: $(OTHERPROG)
-
-unsupported:
- @echo "Your system (${host_os}) is not supported by the"
- @echo "${topdir}/support/shobj-conf script."
- @echo "If your operating system provides facilities for dynamic"
- @echo "loading of shared objects using the dlopen(3) interface,"
- @echo "please update the script and re-run configure.
- @echo "Please send the changes you made to bash-maintainers@gnu.org"
- @echo "for inclusion in future bash releases."
-
-everything: supported others
-
-print: print.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ print.o $(SHOBJ_LIBS)
-
-necho: necho.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ necho.o $(SHOBJ_LIBS)
-
-getconf: getconf.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ getconf.o $(SHOBJ_LIBS)
-
-hello: hello.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ hello.o $(SHOBJ_LIBS)
-
-truefalse: truefalse.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ truefalse.o $(SHOBJ_LIBS)
-
-sleep: sleep.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sleep.o $(SHOBJ_LIBS)
-
-finfo: finfo.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ finfo.o $(SHOBJ_LIBS)
-
-cat: cat.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cat.o $(SHOBJ_LIBS)
-
-logname: logname.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ logname.o $(SHOBJ_LIBS)
-
-basename: basename.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ basename.o $(SHOBJ_LIBS)
-
-dirname: dirname.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ dirname.o $(SHOBJ_LIBS)
-
-tty: tty.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tty.o $(SHOBJ_LIBS)
-
-pathchk: pathchk.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pathchk.o $(SHOBJ_LIBS)
-
-tee: tee.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tee.o $(SHOBJ_LIBS)
-
-mkdir: mkdir.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mkdir.o $(SHOBJ_LIBS)
-
-rmdir: rmdir.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ rmdir.o $(SHOBJ_LIBS)
-
-head: head.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ head.o $(SHOBJ_LIBS)
-
-printenv: printenv.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ printenv.o $(SHOBJ_LIBS)
-
-id: id.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ id.o $(SHOBJ_LIBS)
-
-whoami: whoami.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ whoami.o $(SHOBJ_LIBS)
-
-uname: uname.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ uname.o $(SHOBJ_LIBS)
-
-sync: sync.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sync.o $(SHOBJ_LIBS)
-
-push: push.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ push.o $(SHOBJ_LIBS)
-
-ln: ln.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ ln.o $(SHOBJ_LIBS)
-
-unlink: unlink.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ unlink.o $(SHOBJ_LIBS)
-
-cut: cut.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cut.o $(SHOBJ_LIBS)
-
-realpath: realpath.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ realpath.o $(SHOBJ_LIBS)
-
-strftime: strftime.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ strftime.o $(SHOBJ_LIBS)
-
-# pushd is a special case. We use the same source that the builtin version
-# uses, with special compilation options.
-#
-pushd.c: ${topdir}/builtins/pushd.def
- $(RM) $@
- ${BUILD_DIR}/builtins/mkbuiltins -D ${topdir}/builtins ${topdir}/builtins/pushd.def
-
-pushd.o: pushd.c
- $(RM) $@
- $(SHOBJ_CC) -DHAVE_CONFIG_H -DPUSHD_AND_POPD -DLOADABLE_BUILTIN $(SHOBJ_CFLAGS) $(CFLAGS) $(CPPFLAGS) $(INC) -c -o $@ $<
-
-pushd: pushd.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pushd.o $(SHOBJ_LIBS)
-
-clean:
- $(RM) $(ALLPROG) $(OTHERPROG) *.o
- -( cd perl && ${MAKE} ${MFLAGS} $@ )
-
-mostlyclean: clean
- -( cd perl && ${MAKE} ${MFLAGS} $@ )
-
-distclean maintainer-clean: clean
- $(RM) Makefile pushd.c
- -( cd perl && ${MAKE} ${MFLAGS} $@ )
-
-print.o: print.c
-truefalse.o: truefalse.c
-sleep.o: sleep.c
-finfo.o: finfo.c
-logname.o: logname.c
-basename.o: basename.c
-dirname.o: dirname.c
-tty.o: tty.c
-pathchk.o: pathchk.c
-tee.o: tee.c
-head.o: head.c
-rmdir.o: rmdir.c
-necho.o: necho.c
-getconf.o: getconf.c
-hello.o: hello.c
-cat.o: cat.c
-printenv.o: printenv.c
-id.o: id.c
-whoami.o: whoami.c
-uname.o: uname.c
-sync.o: sync.c
-push.o: push.c
-mkdir.o: mkdir.c
-realpath.o: realpath.c
-strftime.o: strftime.c
+++ /dev/null
-#!/bin/bash
-# ash -- "Adventure shell"
-# last edit: 86/04/21 D A Gwyn
-# SCCS ID: @(#)ash.sh 1.4
-
-OPATH=$PATH
-
-ask()
-{
- echo -n "$@" '[y/n] '
- read ans
-
- case "$ans" in
- y*|Y*)
- return 0
- ;;
- *)
- return 1
- ;;
- esac
-}
-
-CAT=${PAGER:-more}
-
-ash_inst()
-{
- cat <<- EOF
-
- Instructions for the Adventure shell
-
- Welcome to the Adventure shell! In this exploration of the UNIX file
- system, I will act as your eyes and hands. As you move around, I will
- describe whatever is visible and will carry out your commands. The
- general form of a command is
- Verb Object Extra_stuff.
- Most commands pay no attention to the "Extra_stuff", and many do not
- need an "Object". A typical command is
- get all
- which picks up all files in the current "room" (directory). You can
- find out what you are carrying by typing the command
- inventory
- The command "help" results in a full description of all commands that I
- understand. To quit the Adventure shell, type
- quit
-
- There are UNIX monsters lurking in the background. These are also
- known as "commands with arguments".
-
- Good luck!
- EOF
-}
-
-ash_help()
-{
-echo "I understand the following commands (synonyms in parentheses):"
-echo ""
-
-echo "change OBJECT to NEW_NAME changes the name of the object"
-echo "clone OBJECT as NEW_NAME duplicates the object"
-echo "drop OBJECTS leaves the objects in the room"
-echo "enter (go) PASSAGE takes the labeled passage"
-echo "examine OBJECTS describes the objects in detail"
-echo "feed OBJECT to MONSTER stuffs the object into a UNIX monster"
-echo "get (take) OBJECTS picks up the specified objects"
-echo "gripe (bug) report a problem with the Adventure shell"
-echo "help prints this summary"
-echo "inventory (i) tells what you are carrying"
-echo "kill (destroy) OBJECTS destroys the objects"
-echo "look (l) describes the room, including hidden objects"
-echo "open (read) OBJECT shows the contents of an object"
-echo "quit (exit) leaves the Adventure shell"
-echo "resurrect OBJECTS attempts to restore dead objects"
-echo "steal OBJECT from MONSTER obtains the object from a UNIX monster"
-echo "throw OBJECT at daemon feeds the object to the printer daemon"
-echo "up takes the overhead passage"
-echo "wake MONSTER awakens a UNIX monster"
-echo "where (w) tells you where you are"
-echo "xyzzy moves you to your home"
-}
-
-MAINT=chet@ins.cwru.edu
-
-PATH=/usr/ucb:/bin:/usr/bin:/usr/local/bin:.
-export PATH
-
-trap 'echo Ouch!' 2 3
-#trap '' 18 # disable Berkeley job control
-
-ash_lk(){ echo " $1 " | fgrep " $2 " >&- 2>&-; }
-ash_pr(){ echo $* | tr ' ' '\012' | pr -5 -t -w75 -l$[ ( $# + 4 ) / 5 ]; }
-ash_rm(){ echo " $1 " | sed -e "s/ $2 / /" -e 's/^ //' -e 's/ $//'; }
-
-# enable history, bang history expansion, and emacs editing
-set -o history
-set -o histexpand
-set -o emacs
-
-cd
-LIM=.limbo # $HOME/$LIM contains "destroyed" objects
-mkdir $LIM >&- 2>&-
-KNAP=.knapsack # $HOME/$KNAP contains objects being "carried"
-if [ ! -d $KNAP ]
-then mkdir $KNAP >&- 2>&-
- if [ $? = 0 ]
- then echo 'You found a discarded empty knapsack.'
- else echo 'You have no knapsack to carry things in.'
- exit 1
- fi
-else echo 'One moment while I peek in your old knapsack...'
-fi
-
-kn=`echo \`ls -a $KNAP | sed -e '/^\.$/d' -e '/^\.\.$/d'\``
-
-if ask 'Welcome to the Adventure shell! Do you need instructions?'
-then
- ash_inst
- echo -n 'Type a newline to continue: '
- read
-fi
-
-wiz=false
-cha=false
-prev=$LIM
-while :
-do room=`pwd`
- if [ $room != $prev ]
- then if [ $room = $HOME ]
- then echo 'You are in your own home.'
- else echo "You have entered $room."
- fi
- exs=
- obs=
- hexs=
- hobs=
- f=false
- for i in `ls -a`
- do case $i in
- .|..) ;;
- .*) if [ -f $i ]
- then hobs="$hobs $i"
- elif [ -d $i ]
- then hexs="$hexs $i"
- else f=true
- fi
- ;;
- *) if [ -f $i ]
- then obs="$obs $i"
- elif [ -d $i ]
- then exs="$exs $i"
- else f=true
- fi
- ;;
- esac
- done
- if [ "$obs" ]
- then echo 'This room contains:'
- ash_pr $obs
- else echo 'The room looks empty.'
- fi
- if [ "$exs" ]
- then echo 'There are exits labeled:'
- ash_pr $exs
- echo 'as well as a passage overhead.'
- else echo 'There is a passage overhead.'
- fi
- if sh -c $f
- then echo 'There are shadowy figures in the corner.'
- fi
- prev=$room
- fi
-
- read -e -p '-advsh> ' verb obj x # prompt is '-advsh> '
- if [ $? != 0 ]
- then verb=quit # EOF
- fi
-
- case $verb in
- change) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then set -- $x
- case "$1" in
- to) if [ "$2" ]
- then if [ -f $2 ]
- then echo "You must destroy $2 first."
- set --
- fi
- if [ "$2" ]
- then if mv $obj $2 >&- 2>&-
- then echo "The $obj shimmers and turns into $2."
- obs=`ash_rm "$2 $obs" "$obj"`
- else echo "There is a cloud of smoke but the $obj is unchanged."
- fi
- fi
- else echo 'To what?'
- fi
- ;;
- *) echo "Change $obj to what?"
- ;;
- esac
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Change what?'
- fi
- ;;
- clone) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then if [ ! -r $obj ]
- then echo "The $obj does not wish to be cloned."
- else set -- $x
- case "$1" in
- as) if [ "$2" ]
- then if [ -f $2 ]
- then echo "You must destroy $2 first."
- else if cp $obj $2 >&- 2>&-
- then echo "Poof! When the smoke clears, you see the new $2."
- obs="$obs $2"
- else echo 'You hear a dull thud but no clone appears.'
- fi
- fi
- else echo 'As what?'
- fi
- ;;
- *) echo "Clone $obj as what?"
- ;;
- esac
- fi
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Clone what?'
- fi
- ;;
- drop) if [ "$obj" ]
- then for it in $obj $x
- do if ash_lk "$kn" "$it"
- then if [ -w $it ]
- then echo "You must destroy $it first."
- else if mv $HOME/$KNAP/$it $it >&- 2>&-
- then echo "$it: dropped."
- kn=`ash_rm "$kn" "$it"`
- obs=`echo $it $obs`
- else echo "The $it is caught in your knapsack."
- fi
- fi
- else echo "You're not carrying the $it!"
- fi
- done
- else echo 'Drop what?'
- fi
- ;;
- enter|go) if [ "$obj" ]
- then if [ $obj != up ]
- then if ash_lk "$exs $hexs" "$obj"
- then if [ -x $obj ]
- then if cd $obj
- then echo 'You squeeze through the passage.'
- else echo "You can't go that direction."
- fi
- else echo 'An invisible force blocks your way.'
- fi
- else echo 'I see no such passage.'
- fi
- else if cd ..
- then echo 'You struggle upwards.'
- else echo "You can't reach that high."
- fi
- fi
- else echo 'Which passage?'
- fi
- ;;
- examine) if [ "$obj" ]
- then if [ $obj = all ]
- then $obj=`echo $obs $exs`
- x=
- fi
- for it in $obj $x
- do if ash_lk "$obs $hobs $exs $hexs" "$it"
- then echo "Upon close inspection of the $it, you see:"
- ls -ld $it 2>&-
- if [ $? != 0 ]
- then echo "-- when you look directly at the $it, it vanishes."
- fi
- else if ash_lk "$kn" "$it"
- then echo 'You must drop it first.'
- else echo "I see no $it here."
- fi
- fi
- done
- else echo 'Examine what?'
- fi
- ;;
- feed) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then set -- $x
- case "$1" in
- to) if [ "$2" ]
- then shift
- if PATH=$OPATH $* <$obj 2>&-
- then echo "The $1 monster devours your $obj."
- if rm -f $obj >&- 2>&-
- then obs=`ash_rm "$obs" "$obj"`
- else echo 'But he spits it back up.'
- fi
- else echo "The $1 monster holds his nose in disdain."
- fi
- else echo 'To what?'
- fi
- ;;
- *) echo "Feed $obj to what?"
- ;;
- esac
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Feed what?'
- fi
- ;;
- get|take) if [ "$obj" ]
- then if [ $obj = all ]
- then obj="$obs"
- x=
- fi
- for it in $obj $x
- do if ash_lk "$obs $hobs" "$it"
- then if ash_lk "$kn" "$it"
- then echo 'You already have one.'
- else if mv $it $HOME/$KNAP/$it >&- 2>&-
- then echo "$it: taken."
- kn="$it $kn"
- obs=`ash_rm "$obs" "$it"`
- else echo "The $it is too heavy."
- fi
- fi
- else echo "I see no $it here."
- fi
- done
- else echo 'Get what?'
- fi
- ;;
- gripe|bug) echo 'Please describe the problem and your situation at the time it failed.\nEnd the bug report with a line containing just a Ctrl-D.'
- cat | mail $MAINT -s 'ash bug'
- echo 'Thank you!'
- ;;
- help) ash_help
- ;;
- inventory|i) if [ "$kn" ]
- then echo 'Your knapsack contains:'
- ash_pr $kn
- else echo 'You are poverty-stricken.'
- fi
- ;;
- kill|destroy) if [ "$obj" ]
- then if [ $obj = all ]
- then x=
- if ask "Do you really want to attempt to $verb them all?"
- then obj=`echo $obs`
- else echo 'Chicken!'
- obj=
- fi
- fi
- for it in $obj $x
- do if ash_lk "$obs $hobs" "$it"
- then if mv $it $HOME/$LIM <&- >&- 2>&-
- then if [ $verb = kill ]
- then echo "The $it cannot defend himself; he dies."
- else echo "You have destroyed the $it; it vanishes."
- fi
- obs=`ash_rm "$obs" "$it"`
- else if [ $verb = kill ]
- then echo "Your feeble blows are no match for the $it."
- else echo "The $it is indestructible."
- fi
- fi
- else if ash_lk "$kn" "$it"
- then echo "You must drop the $it first."
- found=false
- else echo "I see no $it here."
- fi
- fi
- done
- else echo 'Kill what?'
- fi
- ;;
- look|l) obs=`echo $obs $hobs`
- hobs=
- if [ "$obs" ]
- then echo 'The room contains:'
- ash_pr $obs
- else echo 'The room is empty.'
- fi
- exs=`echo $exs $hexs`
- hexs=
- if [ "$exs" ]
- then echo 'There are exits plainly labeled:'
- ash_pr $exs
- echo 'and a passage directly overhead.'
- else echo 'The only exit is directly overhead.'
- fi
- ;;
- magic) if [ "$obj" = mode ]
- then if sh -c $cha
- then echo 'You had your chance and you blew it.'
- else if ask 'Are you a wizard?'
- then echo -n 'Prove it! Say the magic word: '
- read obj
- if [ "$obj" = armadillo ]
- then echo 'Yes, master!!'
- wiz=true
- else echo "Homie says: I don't think so"
- cha=true
- fi
- else echo "I didn't think so."
- fi
- fi
- else echo 'Nice try.'
- fi
- ;;
- open|read) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then if [ -r $obj ]
- then if [ -s $obj ]
- then echo "Opening the $obj reveals:"
- $CAT < $obj
- if [ $? != 0 ]
- then echo '-- oops, you lost the contents!'
- fi
- else echo "There is nothing inside the $obj."
- fi
- else echo "You do not have the proper tools to open the $obj."
- fi
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- found=false
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Open what?'
- fi
- ;;
- quit|exit) if ask 'Do you really want to quit now?'
- then if [ "$kn" ]
- then echo 'The contents of your knapsack will still be there next time.'
- fi
- rm -rf $HOME/$LIM
- echo 'See you later!'
- exit 0
- fi
- ;;
- resurrect) if [ "$obj" ]
- then for it in $obj $x
- do if ash_lk "$obs $hobs" "$it"
- then echo "The $it is already alive and well."
- else if mv $HOME/$LIM/$it $it <&- >&- 2>&-
- then echo "The $it staggers to his feet."
- obs=`echo $it $obs`
- else echo "There are sparks but no $it appears."
- fi
- fi
- done
- else echo 'Resurrect what?'
- fi
- ;;
- steal) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then echo 'There is already one here.'
- else set -- $x
- case "$1" in
- from) if [ "$2" ]
- then shift
- if PATH=$OPATH $* >$obj 2>&-
- then echo "The $1 monster drops the $obj."
- obs=`echo $obj $obs`
- else echo "The $1 monster runs away as you approach."
- rm -f $obj >&- 2>&-
- fi
- else echo 'From what?'
- fi
- ;;
- *) echo "Steal $obj from what?"
- ;;
- esac
- fi
- else echo 'Steal what?'
- fi
- ;;
- throw) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then set -- $x
- case "$1" in
- at) case "$2" in
- daemon) if sh -c "lpr -r $obj"
- then echo "The daemon catches the $obj, turns it into paper,\nand leaves it in the basket."
- obs=`ash_rm "$obs" "$obj"`
- else echo "The daemon is nowhere to be found."
- fi
- ;;
- *) echo 'At what?'
- ;;
- esac
- ;;
- *) echo "Throw $obj at what?"
- ;;
- esac
- else if ash_lk "$kn" "$obj"
- then echo 'It is in your knapsack.'
- found=false
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Throw what?'
- fi
- ;;
- u|up) if cd ..
- then echo 'You pull yourself up a level.'
- else echo "You can't reach that high."
- fi
- ;;
- wake) if [ "$obj" ]
- then echo "You awaken the $obj monster:"
- PATH=$OPATH $obj $x
- echo 'The monster slithers back into the darkness.'
- else echo 'Wake what?'
- fi
- ;;
- w|where) echo "You are in $room."
- ;;
- xyzzy) if cd
- then echo 'A strange feeling comes over you.'
- else echo 'Your spell fizzles out.'
- fi
- ;;
- *) if [ "$verb" ]
- then if sh -c $wiz
- then PATH=$OPATH $verb $obj $x
- else echo "I don't know how to \"$verb\"."
- echo 'Type "help" for assistance.'
- fi
- else echo 'Say something!'
- fi
- ;;
- esac
-done
+++ /dev/null
-/* display.c -- readline redisplay facility. */
-
-/* Copyright (C) 1987-2012 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#include "posixstat.h"
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include <stdio.h>
-
-#ifdef __MSDOS__
-# include <pc.h>
-#endif
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-/* Termcap library stuff. */
-#include "tcap.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "xmalloc.h"
-
-#if !defined (strchr) && !defined (__STDC__)
-extern char *strchr (), *strrchr ();
-#endif /* !strchr && !__STDC__ */
-
-static void update_line PARAMS((char *, char *, int, int, int, int));
-static void space_to_eol PARAMS((int));
-static void delete_chars PARAMS((int));
-static void insert_some_chars PARAMS((char *, int, int));
-static void open_some_spaces PARAMS((int));
-static void cr PARAMS((void));
-
-/* State of visible and invisible lines. */
-struct line_state
- {
- char *line;
- int *lbreaks;
- int lbsize;
-#if defined (HANDLE_MULTIBYTE)
- int *wrapped_line;
- int wbsize;
-#endif
- };
-
-/* The line display buffers. One is the line currently displayed on
- the screen. The other is the line about to be displayed. */
-static struct line_state line_state_array[2];
-static struct line_state *line_state_visible = &line_state_array[0];
-static struct line_state *line_state_invisible = &line_state_array[1];
-static int line_structures_initialized = 0;
-
-/* Backwards-compatible names. */
-#define inv_lbreaks (line_state_invisible->lbreaks)
-#define inv_lbsize (line_state_invisible->lbsize)
-#define vis_lbreaks (line_state_visible->lbreaks)
-#define vis_lbsize (line_state_visible->lbsize)
-
-#define visible_line (line_state_visible->line)
-#define invisible_line (line_state_invisible->line)
-
-#if defined (HANDLE_MULTIBYTE)
-static int _rl_col_width PARAMS((const char *, int, int, int));
-#else
-# define _rl_col_width(l, s, e, f) (((e) <= (s)) ? 0 : (e) - (s))
-#endif
-
-/* Heuristic used to decide whether it is faster to move from CUR to NEW
- by backing up or outputting a carriage return and moving forward. CUR
- and NEW are either both buffer positions or absolute screen positions. */
-#define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new)))
-
-/* _rl_last_c_pos is an absolute cursor position in multibyte locales and a
- buffer index in others. This macro is used when deciding whether the
- current cursor position is in the middle of a prompt string containing
- invisible characters. XXX - might need to take `modmark' into account. */
-#define PROMPT_ENDING_INDEX \
- ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1)
-
-
-/* **************************************************************** */
-/* */
-/* Display stuff */
-/* */
-/* **************************************************************** */
-
-/* This is the stuff that is hard for me. I never seem to write good
- display routines in C. Let's see how I do this time. */
-
-/* (PWP) Well... Good for a simple line updater, but totally ignores
- the problems of input lines longer than the screen width.
-
- update_line and the code that calls it makes a multiple line,
- automatically wrapping line update. Careful attention needs
- to be paid to the vertical position variables. */
-
-/* Keep two buffers; one which reflects the current contents of the
- screen, and the other to draw what we think the new contents should
- be. Then compare the buffers, and make whatever changes to the
- screen itself that we should. Finally, make the buffer that we
- just drew into be the one which reflects the current contents of the
- screen, and place the cursor where it belongs.
-
- Commands that want to can fix the display themselves, and then let
- this function know that the display has been fixed by setting the
- RL_DISPLAY_FIXED variable. This is good for efficiency. */
-
-/* Application-specific redisplay function. */
-rl_voidfunc_t *rl_redisplay_function = rl_redisplay;
-
-/* Global variables declared here. */
-/* What YOU turn on when you have handled all redisplay yourself. */
-int rl_display_fixed = 0;
-
-int _rl_suppress_redisplay = 0;
-int _rl_want_redisplay = 0;
-
-/* The stuff that gets printed out before the actual text of the line.
- This is usually pointing to rl_prompt. */
-char *rl_display_prompt = (char *)NULL;
-
-/* Pseudo-global variables declared here. */
-
-/* The visible cursor position. If you print some text, adjust this. */
-/* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale
- supporting multibyte characters, and an absolute cursor position when
- in such a locale. This is an artifact of the donated multibyte support.
- Care must be taken when modifying its value. */
-int _rl_last_c_pos = 0;
-int _rl_last_v_pos = 0;
-
-static int cpos_adjusted;
-static int cpos_buffer_position;
-static int displaying_prompt_first_line;
-static int prompt_multibyte_chars;
-
-/* Number of lines currently on screen minus 1. */
-int _rl_vis_botlin = 0;
-
-/* Variables used only in this file. */
-/* The last left edge of text that was displayed. This is used when
- doing horizontal scrolling. It shifts in thirds of a screenwidth. */
-static int last_lmargin;
-
-/* A buffer for `modeline' messages. */
-static char *msg_buf = 0;
-static int msg_bufsiz = 0;
-
-/* Non-zero forces the redisplay even if we thought it was unnecessary. */
-static int forced_display;
-
-/* Default and initial buffer size. Can grow. */
-static int line_size = 1024;
-
-/* Variables to keep track of the expanded prompt string, which may
- include invisible characters. */
-
-static char *local_prompt, *local_prompt_prefix;
-static int local_prompt_len;
-static int prompt_visible_length, prompt_prefix_length;
-
-/* The number of invisible characters in the line currently being
- displayed on the screen. */
-static int visible_wrap_offset;
-
-/* The number of invisible characters in the prompt string. Static so it
- can be shared between rl_redisplay and update_line */
-static int wrap_offset;
-
-/* The index of the last invisible character in the prompt string. */
-static int prompt_last_invisible;
-
-/* The length (buffer offset) of the first line of the last (possibly
- multi-line) buffer displayed on the screen. */
-static int visible_first_line_len;
-
-/* Number of invisible characters on the first physical line of the prompt.
- Only valid when the number of physical characters in the prompt exceeds
- (or is equal to) _rl_screenwidth. */
-static int prompt_invis_chars_first_line;
-
-static int prompt_last_screen_line;
-
-static int prompt_physical_chars;
-
-/* set to a non-zero value by rl_redisplay if we are marking modified history
- lines and the current line is so marked. */
-static int modmark;
-
-/* Variables to save and restore prompt and display information. */
-
-/* These are getting numerous enough that it's time to create a struct. */
-
-static char *saved_local_prompt;
-static char *saved_local_prefix;
-static int saved_last_invisible;
-static int saved_visible_length;
-static int saved_prefix_length;
-static int saved_local_length;
-static int saved_invis_chars_first_line;
-static int saved_physical_chars;
-
-/* Return a character indicating the editing mode, for use in the prompt. */
-static int
-prompt_modechar ()
-{
- if (rl_editing_mode == emacs_mode)
- return '@';
- else if (_rl_keymap == vi_insertion_keymap)
- return '+'; /* vi insert mode */
- else
- return ':'; /* vi command mode */
-}
-
-/* Expand the prompt string S and return the number of visible
- characters in *LP, if LP is not null. This is currently more-or-less
- a placeholder for expansion. LIP, if non-null is a place to store the
- index of the last invisible character in the returned string. NIFLP,
- if non-zero, is a place to store the number of invisible characters in
- the first prompt line. The previous are used as byte counts -- indexes
- into a character buffer. */
-
-/* Current implementation:
- \001 (^A) start non-visible characters
- \002 (^B) end non-visible characters
- all characters except \001 and \002 (following a \001) are copied to
- the returned string; all characters except those between \001 and
- \002 are assumed to be `visible'. */
-
-static char *
-expand_prompt (pmt, lp, lip, niflp, vlp)
- char *pmt;
- int *lp, *lip, *niflp, *vlp;
-{
- char *r, *ret, *p, *igstart;
- int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars;
-
- /* Short-circuit if we can. */
- if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0)
- {
- if (pmt == rl_prompt && _rl_show_mode_in_prompt)
- {
- l = strlen (pmt);
- r = (char *)xmalloc (l + 2);
- r[0] = prompt_modechar ();
- strcpy (r + 1, pmt);
- }
- else
- r = savestring (pmt);
-
- if (lp)
- *lp = strlen (r);
- if (lip)
- *lip = 0;
- if (niflp)
- *niflp = 0;
- if (vlp)
- *vlp = lp ? *lp : strlen (r);
- return r;
- }
-
- l = strlen (pmt);
- r = ret = (char *)xmalloc (l + 2);
-
- rl = physchars = 0; /* move up here so mode show can set them */
- if (pmt == rl_prompt && _rl_show_mode_in_prompt)
- {
- *r++ = prompt_modechar ();
- rl = physchars = 1;
- }
-
- invfl = 0; /* invisible chars in first line of prompt */
- invflset = 0; /* we only want to set invfl once */
-
- igstart = 0;
- for (ignoring = last = ninvis = 0, p = pmt; p && *p; p++)
- {
- /* This code strips the invisible character string markers
- RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */
- if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */
- {
- ignoring = 1;
- igstart = p;
- continue;
- }
- else if (ignoring && *p == RL_PROMPT_END_IGNORE)
- {
- ignoring = 0;
- if (p != (igstart + 1))
- last = r - ret - 1;
- continue;
- }
- else
- {
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- pind = p - pmt;
- ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO);
- l = ind - pind;
- while (l--)
- *r++ = *p++;
- if (!ignoring)
- {
- /* rl ends up being assigned to prompt_visible_length,
- which is the number of characters in the buffer that
- contribute to characters on the screen, which might
- not be the same as the number of physical characters
- on the screen in the presence of multibyte characters */
- rl += ind - pind;
- physchars += _rl_col_width (pmt, pind, ind, 0);
- }
- else
- ninvis += ind - pind;
- p--; /* compensate for later increment */
- }
- else
-#endif
- {
- *r++ = *p;
- if (!ignoring)
- {
- rl++; /* visible length byte counter */
- physchars++;
- }
- else
- ninvis++; /* invisible chars byte counter */
- }
-
- if (invflset == 0 && rl >= _rl_screenwidth)
- {
- invfl = ninvis;
- invflset = 1;
- }
- }
- }
-
- if (rl < _rl_screenwidth)
- invfl = ninvis;
-
- *r = '\0';
- if (lp)
- *lp = rl;
- if (lip)
- *lip = last;
- if (niflp)
- *niflp = invfl;
- if (vlp)
- *vlp = physchars;
- return ret;
-}
-
-/* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from
- PMT and return the rest of PMT. */
-char *
-_rl_strip_prompt (pmt)
- char *pmt;
-{
- char *ret;
-
- ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL);
- return ret;
-}
-
-void
-_rl_reset_prompt ()
-{
- rl_visible_prompt_length = rl_expand_prompt (rl_prompt);
-}
-
-/*
- * Expand the prompt string into the various display components, if
- * necessary.
- *
- * local_prompt = expanded last line of string in rl_display_prompt
- * (portion after the final newline)
- * local_prompt_prefix = portion before last newline of rl_display_prompt,
- * expanded via expand_prompt
- * prompt_visible_length = number of visible characters in local_prompt
- * prompt_prefix_length = number of visible characters in local_prompt_prefix
- *
- * This function is called once per call to readline(). It may also be
- * called arbitrarily to expand the primary prompt.
- *
- * The return value is the number of visible characters on the last line
- * of the (possibly multi-line) prompt.
- */
-int
-rl_expand_prompt (prompt)
- char *prompt;
-{
- char *p, *t;
- int c;
-
- /* Clear out any saved values. */
- FREE (local_prompt);
- FREE (local_prompt_prefix);
-
- local_prompt = local_prompt_prefix = (char *)0;
- local_prompt_len = 0;
- prompt_last_invisible = prompt_invis_chars_first_line = 0;
- prompt_visible_length = prompt_physical_chars = 0;
-
- if (prompt == 0 || *prompt == 0)
- return (0);
-
- p = strrchr (prompt, '\n');
- if (!p)
- {
- /* The prompt is only one logical line, though it might wrap. */
- local_prompt = expand_prompt (prompt, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)0;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- return (prompt_visible_length);
- }
- else
- {
- /* The prompt spans multiple lines. */
- t = ++p;
- local_prompt = expand_prompt (p, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- c = *t; *t = '\0';
- /* The portion of the prompt string up to and including the
- final newline is now null-terminated. */
- local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length,
- (int *)NULL,
- (int *)NULL,
- (int *)NULL);
- *t = c;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- return (prompt_prefix_length);
- }
-}
-
-/* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated
- arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE
- and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is
- increased. If the lines have already been allocated, this ensures that
- they can hold at least MINSIZE characters. */
-static void
-init_line_structures (minsize)
- int minsize;
-{
- register int n;
-
- if (invisible_line == 0) /* initialize it */
- {
- if (line_size < minsize)
- line_size = minsize;
- visible_line = (char *)xmalloc (line_size);
- invisible_line = (char *)xmalloc (line_size);
- }
- else if (line_size < minsize) /* ensure it can hold MINSIZE chars */
- {
- line_size *= 2;
- if (line_size < minsize)
- line_size = minsize;
- visible_line = (char *)xrealloc (visible_line, line_size);
- invisible_line = (char *)xrealloc (invisible_line, line_size);
- }
-
- for (n = minsize; n < line_size; n++)
- {
- visible_line[n] = 0;
- invisible_line[n] = 1;
- }
-
- if (vis_lbreaks == 0)
- {
- /* should be enough. */
- inv_lbsize = vis_lbsize = 256;
-
-#if defined (HANDLE_MULTIBYTE)
- line_state_visible->wbsize = vis_lbsize;
- line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int));
-
- line_state_invisible->wbsize = inv_lbsize;
- line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int));
-#endif
-
- inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int));
- vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int));
- inv_lbreaks[0] = vis_lbreaks[0] = 0;
- }
-
- line_structures_initialized = 1;
-}
-
-/* Basic redisplay algorithm. */
-void
-rl_redisplay ()
-{
- register int in, out, c, linenum, cursor_linenum;
- register char *line;
- int inv_botlin, lb_botlin, lb_linenum, o_cpos;
- int newlines, lpos, temp, n0, num, prompt_lines_estimate;
- char *prompt_this_line;
-#if defined (HANDLE_MULTIBYTE)
- wchar_t wc;
- size_t wc_bytes;
- int wc_width;
- mbstate_t ps;
- int _rl_wrapped_multicolumn = 0;
-#endif
-
- if (_rl_echoing_p == 0)
- return;
-
- /* Block keyboard interrupts because this function manipulates global
- data structures. */
- _rl_block_sigint ();
- RL_SETSTATE (RL_STATE_REDISPLAYING);
-
- if (!rl_display_prompt)
- rl_display_prompt = "";
-
- if (line_structures_initialized == 0)
- {
- init_line_structures (0);
- rl_on_new_line ();
- }
-
- /* Draw the line into the buffer. */
- cpos_buffer_position = -1;
-
- prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars;
-
- line = invisible_line;
- out = inv_botlin = 0;
-
- /* Mark the line as modified or not. We only do this for history
- lines. */
- modmark = 0;
- if (_rl_mark_modified_lines && current_history () && rl_undo_list)
- {
- line[out++] = '*';
- line[out] = '\0';
- modmark = 1;
- }
-
- /* If someone thought that the redisplay was handled, but the currently
- visible line has a different modification state than the one about
- to become visible, then correct the caller's misconception. */
- if (visible_line[0] != invisible_line[0])
- rl_display_fixed = 0;
-
- /* If the prompt to be displayed is the `primary' readline prompt (the
- one passed to readline()), use the values we have already expanded.
- If not, use what's already in rl_display_prompt. WRAP_OFFSET is the
- number of non-visible characters in the prompt string. */
- if (rl_display_prompt == rl_prompt || local_prompt)
- {
- if (local_prompt_prefix && forced_display)
- _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix));
-
- if (local_prompt_len > 0)
- {
- temp = local_prompt_len + out + 2;
- if (temp >= line_size)
- {
- line_size = (temp + 1024) - (temp % 1024);
- visible_line = (char *)xrealloc (visible_line, line_size);
- line = invisible_line = (char *)xrealloc (invisible_line, line_size);
- }
- strncpy (line + out, local_prompt, local_prompt_len);
- out += local_prompt_len;
- }
- line[out] = '\0';
- wrap_offset = local_prompt_len - prompt_visible_length;
- }
- else
- {
- int pmtlen;
- prompt_this_line = strrchr (rl_display_prompt, '\n');
- if (!prompt_this_line)
- prompt_this_line = rl_display_prompt;
- else
- {
- prompt_this_line++;
- pmtlen = prompt_this_line - rl_display_prompt; /* temp var */
- if (forced_display)
- {
- _rl_output_some_chars (rl_display_prompt, pmtlen);
- /* Make sure we are at column zero even after a newline,
- regardless of the state of terminal output processing. */
- if (pmtlen < 2 || prompt_this_line[-2] != '\r')
- cr ();
- }
- }
-
- prompt_physical_chars = pmtlen = strlen (prompt_this_line);
- temp = pmtlen + out + 2;
- if (temp >= line_size)
- {
- line_size = (temp + 1024) - (temp % 1024);
- visible_line = (char *)xrealloc (visible_line, line_size);
- line = invisible_line = (char *)xrealloc (invisible_line, line_size);
- }
- strncpy (line + out, prompt_this_line, pmtlen);
- out += pmtlen;
- line[out] = '\0';
- wrap_offset = prompt_invis_chars_first_line = 0;
- }
-
-#define CHECK_INV_LBREAKS() \
- do { \
- if (newlines >= (inv_lbsize - 2)) \
- { \
- inv_lbsize *= 2; \
- inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
- } \
- } while (0)
-
-#if defined (HANDLE_MULTIBYTE)
-#define CHECK_LPOS() \
- do { \
- lpos++; \
- if (lpos >= _rl_screenwidth) \
- { \
- if (newlines >= (inv_lbsize - 2)) \
- { \
- inv_lbsize *= 2; \
- inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
- } \
- inv_lbreaks[++newlines] = out; \
- if (newlines >= (line_state_invisible->wbsize - 1)) \
- { \
- line_state_invisible->wbsize *= 2; \
- line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \
- } \
- line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \
- lpos = 0; \
- } \
- } while (0)
-#else
-#define CHECK_LPOS() \
- do { \
- lpos++; \
- if (lpos >= _rl_screenwidth) \
- { \
- if (newlines >= (inv_lbsize - 2)) \
- { \
- inv_lbsize *= 2; \
- inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
- } \
- inv_lbreaks[++newlines] = out; \
- lpos = 0; \
- } \
- } while (0)
-#endif
-
- /* inv_lbreaks[i] is where line i starts in the buffer. */
- inv_lbreaks[newlines = 0] = 0;
- lpos = prompt_physical_chars + modmark;
-
-#if defined (HANDLE_MULTIBYTE)
- memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int));
- num = 0;
-#endif
-
- /* prompt_invis_chars_first_line is the number of invisible characters in
- the first physical line of the prompt.
- wrap_offset - prompt_invis_chars_first_line is the number of invis
- chars on the second (or, more generally, last) line. */
-
- /* This is zero-based, used to set the newlines */
- prompt_lines_estimate = lpos / _rl_screenwidth;
-
- /* what if lpos is already >= _rl_screenwidth before we start drawing the
- contents of the command line? */
- while (lpos >= _rl_screenwidth)
- {
- int z;
- /* fix from Darin Johnson <darin@acuson.com> for prompt string with
- invisible characters that is longer than the screen width. The
- prompt_invis_chars_first_line variable could be made into an array
- saying how many invisible characters there are per line, but that's
- probably too much work for the benefit gained. How many people have
- prompts that exceed two physical lines?
- Additional logic fix from Edward Catmur <ed@catmur.co.uk> */
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0)
- {
- n0 = num;
- temp = local_prompt_len;
- while (num < temp)
- {
- z = _rl_col_width (local_prompt, n0, num, 1);
- if (z > _rl_screenwidth)
- {
- num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY);
- break;
- }
- else if (z == _rl_screenwidth)
- break;
- num++;
- }
- temp = num;
- }
- else
-#endif /* !HANDLE_MULTIBYTE */
- temp = ((newlines + 1) * _rl_screenwidth);
-
- /* Now account for invisible characters in the current line. */
- /* XXX - this assumes that the invisible characters may be split, but only
- between the first and the last lines. */
- temp += ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line
- : ((newlines == prompt_lines_estimate) ? wrap_offset : prompt_invis_chars_first_line))
- : ((newlines == 0) ? wrap_offset : 0));
-
- inv_lbreaks[++newlines] = temp;
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0)
- lpos -= _rl_col_width (local_prompt, n0, num, 1);
- else
-#endif
- lpos -= _rl_screenwidth;
- }
-
- prompt_last_screen_line = newlines;
-
- /* Draw the rest of the line (after the prompt) into invisible_line, keeping
- track of where the cursor is (cpos_buffer_position), the number of the line containing
- the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin).
- It maintains an array of line breaks for display (inv_lbreaks).
- This handles expanding tabs for display and displaying meta characters. */
- lb_linenum = 0;
-#if defined (HANDLE_MULTIBYTE)
- in = 0;
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- memset (&ps, 0, sizeof (mbstate_t));
- /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */
- wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps);
- }
- else
- wc_bytes = 1;
- while (in < rl_end)
-#else
- for (in = 0; in < rl_end; in++)
-#endif
- {
- c = (unsigned char)rl_line_buffer[in];
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- if (MB_INVALIDCH (wc_bytes))
- {
- /* Byte sequence is invalid or shortened. Assume that the
- first byte represents a character. */
- wc_bytes = 1;
- /* Assume that a character occupies a single column. */
- wc_width = 1;
- memset (&ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (wc_bytes))
- break; /* Found '\0' */
- else
- {
- temp = WCWIDTH (wc);
- wc_width = (temp >= 0) ? temp : 1;
- }
- }
-#endif
-
- if (out + 8 >= line_size) /* XXX - 8 for \t */
- {
- line_size *= 2;
- visible_line = (char *)xrealloc (visible_line, line_size);
- invisible_line = (char *)xrealloc (invisible_line, line_size);
- line = invisible_line;
- }
-
- if (in == rl_point)
- {
- cpos_buffer_position = out;
- lb_linenum = newlines;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */
-#else
- if (META_CHAR (c))
-#endif
- {
- if (_rl_output_meta_chars == 0)
- {
- sprintf (line + out, "\\%o", c);
-
- if (lpos + 4 >= _rl_screenwidth)
- {
- temp = _rl_screenwidth - lpos;
- CHECK_INV_LBREAKS ();
- inv_lbreaks[++newlines] = out + temp;
- lpos = 4 - temp;
- }
- else
- lpos += 4;
-
- out += 4;
- }
- else
- {
- line[out++] = c;
- CHECK_LPOS();
- }
- }
-#if defined (DISPLAY_TABS)
- else if (c == '\t')
- {
- register int newout;
-
-#if 0
- newout = (out | (int)7) + 1;
-#else
- newout = out + 8 - lpos % 8;
-#endif
- temp = newout - out;
- if (lpos + temp >= _rl_screenwidth)
- {
- register int temp2;
- temp2 = _rl_screenwidth - lpos;
- CHECK_INV_LBREAKS ();
- inv_lbreaks[++newlines] = out + temp2;
- lpos = temp - temp2;
- while (out < newout)
- line[out++] = ' ';
- }
- else
- {
- while (out < newout)
- line[out++] = ' ';
- lpos += temp;
- }
- }
-#endif
- else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up)
- {
- line[out++] = '\0'; /* XXX - sentinel */
- CHECK_INV_LBREAKS ();
- inv_lbreaks[++newlines] = out;
- lpos = 0;
- }
- else if (CTRL_CHAR (c) || c == RUBOUT)
- {
- line[out++] = '^';
- CHECK_LPOS();
- line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?';
- CHECK_LPOS();
- }
- else
- {
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- register int i;
-
- _rl_wrapped_multicolumn = 0;
-
- if (_rl_screenwidth < lpos + wc_width)
- for (i = lpos; i < _rl_screenwidth; i++)
- {
- /* The space will be removed in update_line() */
- line[out++] = ' ';
- _rl_wrapped_multicolumn++;
- CHECK_LPOS();
- }
- if (in == rl_point)
- {
- cpos_buffer_position = out;
- lb_linenum = newlines;
- }
- for (i = in; i < in+wc_bytes; i++)
- line[out++] = rl_line_buffer[i];
- for (i = 0; i < wc_width; i++)
- CHECK_LPOS();
- }
- else
- {
- line[out++] = c;
- CHECK_LPOS();
- }
-#else
- line[out++] = c;
- CHECK_LPOS();
-#endif
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- in += wc_bytes;
- /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */
- wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps);
- }
- else
- in++;
-#endif
-
- }
- line[out] = '\0';
- if (cpos_buffer_position < 0)
- {
- cpos_buffer_position = out;
- lb_linenum = newlines;
- }
-
- inv_botlin = lb_botlin = newlines;
- CHECK_INV_LBREAKS ();
- inv_lbreaks[newlines+1] = out;
- cursor_linenum = lb_linenum;
-
- /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed.
- CURSOR_LINENUM == line number where the cursor should be placed. */
-
- /* PWP: now is when things get a bit hairy. The visible and invisible
- line buffers are really multiple lines, which would wrap every
- (screenwidth - 1) characters. Go through each in turn, finding
- the changed region and updating it. The line order is top to bottom. */
-
- /* If we can move the cursor up and down, then use multiple lines,
- otherwise, let long lines display in a single terminal line, and
- horizontally scroll it. */
- displaying_prompt_first_line = 1;
- if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up)
- {
- int nleft, pos, changed_screen_line, tx;
-
- if (!rl_display_fixed || forced_display)
- {
- forced_display = 0;
-
- /* If we have more than a screenful of material to display, then
- only display a screenful. We should display the last screen,
- not the first. */
- if (out >= _rl_screenchars)
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY);
- else
- out = _rl_screenchars - 1;
- }
-
- /* The first line is at character position 0 in the buffer. The
- second and subsequent lines start at inv_lbreaks[N], offset by
- OFFSET (which has already been calculated above). */
-
-#define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset)
-#define WRAP_OFFSET(line, offset) ((line == 0) \
- ? (offset ? INVIS_FIRST() : 0) \
- : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0))
-#define W_OFFSET(line, offset) ((line) == 0 ? offset : 0)
-#define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l]))
-#define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l])
-#define VIS_CHARS(line) (visible_line + vis_lbreaks[line])
-#define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line)
-#define INV_LINE(line) (invisible_line + inv_lbreaks[line])
-
-#define OLD_CPOS_IN_PROMPT() (cpos_adjusted == 0 && \
- _rl_last_c_pos != o_cpos && \
- _rl_last_c_pos > wrap_offset && \
- o_cpos < prompt_last_invisible)
-
- /* For each line in the buffer, do the updating display. */
- for (linenum = 0; linenum <= inv_botlin; linenum++)
- {
- /* This can lead us astray if we execute a program that changes
- the locale from a non-multibyte to a multibyte one. */
- o_cpos = _rl_last_c_pos;
- cpos_adjusted = 0;
- update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum,
- VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin);
-
- /* update_line potentially changes _rl_last_c_pos, but doesn't
- take invisible characters into account, since _rl_last_c_pos
- is an absolute cursor position in a multibyte locale. See
- if compensating here is the right thing, or if we have to
- change update_line itself. There are several cases in which
- update_line adjusts _rl_last_c_pos itself (so it can pass
- _rl_move_cursor_relative accurate values); it communicates
- this back by setting cpos_adjusted. If we assume that
- _rl_last_c_pos is correct (an absolute cursor position) each
- time update_line is called, then we can assume in our
- calculations that o_cpos does not need to be adjusted by
- wrap_offset. */
- if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT())
- _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */
- else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth &&
- (MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- cpos_adjusted == 0 &&
- _rl_last_c_pos != o_cpos &&
- _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line))
- _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line);
-
- /* If this is the line with the prompt, we might need to
- compensate for invisible characters in the new line. Do
- this only if there is not more than one new line (which
- implies that we completely overwrite the old visible line)
- and the new line is shorter than the old. Make sure we are
- at the end of the new line before clearing. */
- if (linenum == 0 &&
- inv_botlin == 0 && _rl_last_c_pos == out &&
- (wrap_offset > visible_wrap_offset) &&
- (_rl_last_c_pos < visible_first_line_len))
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- nleft = _rl_screenwidth - _rl_last_c_pos;
- else
- nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos;
- if (nleft)
- _rl_clear_to_eol (nleft);
- }
-#if 0
- /* This segment is intended to handle the case where the prompt
- has invisible characters on the second line and the new line
- to be displayed needs to clear the rest of the old characters
- out (e.g., when printing the i-search prompt). In general,
- the case of the new line being shorter than the old.
- Incomplete */
- else if (linenum == prompt_last_screen_line &&
- prompt_physical_chars > _rl_screenwidth &&
- wrap_offset != prompt_invis_chars_first_line &&
- _rl_last_c_pos == out &&
-#endif
-
-
- /* Since the new first line is now visible, save its length. */
- if (linenum == 0)
- visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset;
- }
-
- /* We may have deleted some lines. If so, clear the left over
- blank ones at the bottom out. */
- if (_rl_vis_botlin > inv_botlin)
- {
- char *tt;
- for (; linenum <= _rl_vis_botlin; linenum++)
- {
- tt = VIS_CHARS (linenum);
- _rl_move_vert (linenum);
- _rl_move_cursor_relative (0, tt);
- _rl_clear_to_eol
- ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth);
- }
- }
- _rl_vis_botlin = inv_botlin;
-
- /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a
- different screen line during this redisplay. */
- changed_screen_line = _rl_last_v_pos != cursor_linenum;
- if (changed_screen_line)
- {
- _rl_move_vert (cursor_linenum);
- /* If we moved up to the line with the prompt using _rl_term_up,
- the physical cursor position on the screen stays the same,
- but the buffer position needs to be adjusted to account
- for invisible characters. */
- if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset)
- _rl_last_c_pos += wrap_offset;
- }
-
- /* We have to reprint the prompt if it contains invisible
- characters, since it's not generally OK to just reprint
- the characters from the current cursor position. But we
- only need to reprint it if the cursor is before the last
- invisible character in the prompt string. */
- nleft = prompt_visible_length + wrap_offset;
- if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 &&
-#if 0
- _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt)
-#else
- _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt)
-#endif
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- if (_rl_term_cr)
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- if (modmark)
- _rl_output_some_chars ("*", 1);
-
- _rl_output_some_chars (local_prompt, nleft);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft, 1) - wrap_offset + modmark;
- else
- _rl_last_c_pos = nleft + modmark;
- }
-
- /* Where on that line? And where does that line start
- in the buffer? */
- pos = inv_lbreaks[cursor_linenum];
- /* nleft == number of characters in the line buffer between the
- start of the line and the desired cursor position. */
- nleft = cpos_buffer_position - pos;
-
- /* NLEFT is now a number of characters in a buffer. When in a
- multibyte locale, however, _rl_last_c_pos is an absolute cursor
- position that doesn't take invisible characters in the prompt
- into account. We use a fudge factor to compensate. */
-
- /* Since _rl_backspace() doesn't know about invisible characters in the
- prompt, and there's no good way to tell it, we compensate for
- those characters here and call _rl_backspace() directly. */
- if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos)
- {
- /* TX == new physical cursor position in multibyte locale. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- tx = _rl_col_width (&visible_line[pos], 0, nleft, 1) - visible_wrap_offset;
- else
- tx = nleft;
- if (tx >= 0 && _rl_last_c_pos > tx)
- {
- _rl_backspace (_rl_last_c_pos - tx); /* XXX */
- _rl_last_c_pos = tx;
- }
- }
-
- /* We need to note that in a multibyte locale we are dealing with
- _rl_last_c_pos as an absolute cursor position, but moving to a
- point specified by a buffer position (NLEFT) that doesn't take
- invisible characters into account. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- _rl_move_cursor_relative (nleft, &invisible_line[pos]);
- else if (nleft != _rl_last_c_pos)
- _rl_move_cursor_relative (nleft, &invisible_line[pos]);
- }
- }
- else /* Do horizontal scrolling. */
- {
-#define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0)
- int lmargin, ndisp, nleft, phys_c_pos, t;
-
- /* Always at top line. */
- _rl_last_v_pos = 0;
-
- /* Compute where in the buffer the displayed line should start. This
- will be LMARGIN. */
-
- /* The number of characters that will be displayed before the cursor. */
- ndisp = cpos_buffer_position - wrap_offset;
- nleft = prompt_visible_length + wrap_offset;
- /* Where the new cursor position will be on the screen. This can be
- longer than SCREENWIDTH; if it is, lmargin will be adjusted. */
- phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset);
- t = _rl_screenwidth / 3;
-
- /* If the number of characters had already exceeded the screenwidth,
- last_lmargin will be > 0. */
-
- /* If the number of characters to be displayed is more than the screen
- width, compute the starting offset so that the cursor is about
- two-thirds of the way across the screen. */
- if (phys_c_pos > _rl_screenwidth - 2)
- {
- lmargin = cpos_buffer_position - (2 * t);
- if (lmargin < 0)
- lmargin = 0;
- /* If the left margin would be in the middle of a prompt with
- invisible characters, don't display the prompt at all. */
- if (wrap_offset && lmargin > 0 && lmargin < nleft)
- lmargin = nleft;
- }
- else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */
- lmargin = 0;
- else if (phys_c_pos < 1)
- {
- /* If we are moving back towards the beginning of the line and
- the last margin is no longer correct, compute a new one. */
- lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */
- if (wrap_offset && lmargin > 0 && lmargin < nleft)
- lmargin = nleft;
- }
- else
- lmargin = last_lmargin;
-
- displaying_prompt_first_line = lmargin < nleft;
-
- /* If the first character on the screen isn't the first character
- in the display line, indicate this with a special character. */
- if (lmargin > 0)
- line[lmargin] = '<';
-
- /* If SCREENWIDTH characters starting at LMARGIN do not encompass
- the whole line, indicate that with a special character at the
- right edge of the screen. If LMARGIN is 0, we need to take the
- wrap offset into account. */
- t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth;
- if (t < out)
- line[t - 1] = '>';
-
- if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin)
- {
- forced_display = 0;
- o_cpos = _rl_last_c_pos;
- cpos_adjusted = 0;
- update_line (&visible_line[last_lmargin],
- &invisible_line[lmargin],
- 0,
- _rl_screenwidth + visible_wrap_offset,
- _rl_screenwidth + (lmargin ? 0 : wrap_offset),
- 0);
-
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- displaying_prompt_first_line && OLD_CPOS_IN_PROMPT())
- _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */
-
- /* If the visible new line is shorter than the old, but the number
- of invisible characters is greater, and we are at the end of
- the new line, we need to clear to eol. */
- t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset);
- if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) &&
- (_rl_last_c_pos == out) && displaying_prompt_first_line &&
- t < visible_first_line_len)
- {
- nleft = _rl_screenwidth - t;
- _rl_clear_to_eol (nleft);
- }
- visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset);
- if (visible_first_line_len > _rl_screenwidth)
- visible_first_line_len = _rl_screenwidth;
-
- _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]);
- last_lmargin = lmargin;
- }
- }
- fflush (rl_outstream);
-
- /* Swap visible and non-visible lines. */
- {
- struct line_state *vtemp = line_state_visible;
-
- line_state_visible = line_state_invisible;
- line_state_invisible = vtemp;
-
- rl_display_fixed = 0;
- /* If we are displaying on a single line, and last_lmargin is > 0, we
- are not displaying any invisible characters, so set visible_wrap_offset
- to 0. */
- if (_rl_horizontal_scroll_mode && last_lmargin)
- visible_wrap_offset = 0;
- else
- visible_wrap_offset = wrap_offset;
- }
-
- RL_UNSETSTATE (RL_STATE_REDISPLAYING);
- _rl_release_sigint ();
-}
-
-/* PWP: update_line() is based on finding the middle difference of each
- line on the screen; vis:
-
- /old first difference
- /beginning of line | /old last same /old EOL
- v v v v
-old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as
-new: eddie> Oh, my little buggy says to me, as lurgid as
- ^ ^ ^ ^
- \beginning of line | \new last same \new end of line
- \new first difference
-
- All are character pointers for the sake of speed. Special cases for
- no differences, as well as for end of line additions must be handled.
-
- Could be made even smarter, but this works well enough */
-static void
-update_line (old, new, current_line, omax, nmax, inv_botlin)
- register char *old, *new;
- int current_line, omax, nmax, inv_botlin;
-{
- register char *ofd, *ols, *oe, *nfd, *nls, *ne;
- int temp, lendiff, wsatend, od, nd, twidth, o_cpos;
- int current_invis_chars;
- int col_lendiff, col_temp;
- int bytes_to_insert;
-#if defined (HANDLE_MULTIBYTE)
- mbstate_t ps_new, ps_old;
- int new_offset, old_offset;
-#endif
-
- /* If we're at the right edge of a terminal that supports xn, we're
- ready to wrap around, so do so. This fixes problems with knowing
- the exact cursor position and cut-and-paste with certain terminal
- emulators. In this calculation, TEMP is the physical screen
- position of the cursor. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- temp = _rl_last_c_pos;
- else
- temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset);
- if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
- && _rl_last_v_pos == current_line - 1)
- {
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- wchar_t wc;
- mbstate_t ps;
- int tempwidth, bytes;
- size_t ret;
-
- /* This fixes only double-column characters, but if the wrapped
- character comsumes more than three columns, spaces will be
- inserted in the string buffer. */
- if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0)
- _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]);
-
- memset (&ps, 0, sizeof (mbstate_t));
- ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps);
- if (MB_INVALIDCH (ret))
- {
- tempwidth = 1;
- ret = 1;
- }
- else if (MB_NULLWCH (ret))
- tempwidth = 0;
- else
- tempwidth = WCWIDTH (wc);
-
- if (tempwidth > 0)
- {
- int count, i;
- bytes = ret;
- for (count = 0; count < bytes; count++)
- putc (new[count], rl_outstream);
- _rl_last_c_pos = tempwidth;
- _rl_last_v_pos++;
- memset (&ps, 0, sizeof (mbstate_t));
- ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps);
- if (ret != 0 && bytes != 0)
- {
- if (MB_INVALIDCH (ret))
- ret = 1;
- memmove (old+bytes, old+ret, strlen (old+ret));
- memcpy (old, new, bytes);
- /* Fix up indices if we copy data from one line to another */
- omax += bytes - ret;
- for (i = current_line+1; i <= inv_botlin+1; i++)
- vis_lbreaks[i] += bytes - ret;
- }
- }
- else
- {
- putc (' ', rl_outstream);
- _rl_last_c_pos = 1;
- _rl_last_v_pos++;
- if (old[0] && new[0])
- old[0] = new[0];
- }
- }
- else
-#endif
- {
- if (new[0])
- putc (new[0], rl_outstream);
- else
- putc (' ', rl_outstream);
- _rl_last_c_pos = 1;
- _rl_last_v_pos++;
- if (old[0] && new[0])
- old[0] = new[0];
- }
- }
-
-
- /* Find first difference. */
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- /* See if the old line is a subset of the new line, so that the
- only change is adding characters. */
- temp = (omax < nmax) ? omax : nmax;
- if (memcmp (old, new, temp) == 0) /* adding at the end */
- {
- new_offset = old_offset = temp;
- ofd = old + temp;
- nfd = new + temp;
- }
- else
- {
- memset (&ps_new, 0, sizeof(mbstate_t));
- memset (&ps_old, 0, sizeof(mbstate_t));
-
- if (omax == nmax && STREQN (new, old, omax))
- {
- old_offset = omax;
- new_offset = nmax;
- ofd = old + omax;
- nfd = new + nmax;
- }
- else
- {
- new_offset = old_offset = 0;
- for (ofd = old, nfd = new;
- (ofd - old < omax) && *ofd &&
- _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); )
- {
- old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY);
- new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY);
-
- ofd = old + old_offset;
- nfd = new + new_offset;
- }
- }
- }
- }
- else
-#endif
- for (ofd = old, nfd = new;
- (ofd - old < omax) && *ofd && (*ofd == *nfd);
- ofd++, nfd++)
- ;
-
- /* Move to the end of the screen line. ND and OD are used to keep track
- of the distance between ne and new and oe and old, respectively, to
- move a subtraction out of each loop. */
- for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++);
- for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++);
-
- /* If no difference, continue to next line. */
- if (ofd == oe && nfd == ne)
- return;
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && _rl_utf8locale)
- {
- wchar_t wc;
- mbstate_t ps = { 0 };
- int t;
-
- /* If the first character in the difference is a zero-width character,
- assume it's a combining character and back one up so the two base
- characters no longer compare equivalently. */
- t = mbrtowc (&wc, ofd, MB_CUR_MAX, &ps);
- if (t > 0 && UNICODE_COMBINING_CHAR (wc) && WCWIDTH (wc) == 0)
- {
- old_offset = _rl_find_prev_mbchar (old, ofd - old, MB_FIND_ANY);
- new_offset = _rl_find_prev_mbchar (new, nfd - new, MB_FIND_ANY);
- ofd = old + old_offset; /* equal by definition */
- nfd = new + new_offset;
- }
- }
-#endif
-
- wsatend = 1; /* flag for trailing whitespace */
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY);
- nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY);
-
- while ((ols > ofd) && (nls > nfd))
- {
- memset (&ps_old, 0, sizeof (mbstate_t));
- memset (&ps_new, 0, sizeof (mbstate_t));
-
-#if 0
- /* On advice from jir@yamato.ibm.com */
- _rl_adjust_point (old, ols - old, &ps_old);
- _rl_adjust_point (new, nls - new, &ps_new);
-#endif
-
- if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0)
- break;
-
- if (*ols == ' ')
- wsatend = 0;
-
- ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY);
- nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY);
- }
- }
- else
- {
-#endif /* HANDLE_MULTIBYTE */
- ols = oe - 1; /* find last same */
- nls = ne - 1;
- while ((ols > ofd) && (nls > nfd) && (*ols == *nls))
- {
- if (*ols != ' ')
- wsatend = 0;
- ols--;
- nls--;
- }
-#if defined (HANDLE_MULTIBYTE)
- }
-#endif
-
- if (wsatend)
- {
- ols = oe;
- nls = ne;
- }
-#if defined (HANDLE_MULTIBYTE)
- /* This may not work for stateful encoding, but who cares? To handle
- stateful encoding properly, we have to scan each string from the
- beginning and compare. */
- else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0)
-#else
- else if (*ols != *nls)
-#endif
- {
- if (*ols) /* don't step past the NUL */
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY);
- else
- ols++;
- }
- if (*nls)
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY);
- else
- nls++;
- }
- }
-
- /* count of invisible characters in the current invisible line. */
- current_invis_chars = W_OFFSET (current_line, wrap_offset);
- if (_rl_last_v_pos != current_line)
- {
- _rl_move_vert (current_line);
- if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset)
- _rl_last_c_pos += visible_wrap_offset;
- }
-
- /* If this is the first line and there are invisible characters in the
- prompt string, and the prompt string has not changed, and the current
- cursor position is before the last invisible character in the prompt,
- and the index of the character to move to is past the end of the prompt
- string, then redraw the entire prompt string. We can only do this
- reliably if the terminal supports a `cr' capability.
-
- This is not an efficiency hack -- there is a problem with redrawing
- portions of the prompt string if they contain terminal escape
- sequences (like drawing the `unbold' sequence without a corresponding
- `bold') that manifests itself on certain terminals. */
-
- lendiff = local_prompt_len;
- od = ofd - old; /* index of first difference in visible line */
- if (current_line == 0 && !_rl_horizontal_scroll_mode &&
- _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 &&
- od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX)
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- if (modmark)
- _rl_output_some_chars ("*", 1);
- _rl_output_some_chars (local_prompt, lendiff);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- /* We take wrap_offset into account here so we can pass correct
- information to _rl_move_cursor_relative. */
- _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff, 1) - wrap_offset + modmark;
- cpos_adjusted = 1;
- }
- else
- _rl_last_c_pos = lendiff + modmark;
- }
-
- o_cpos = _rl_last_c_pos;
-
- /* When this function returns, _rl_last_c_pos is correct, and an absolute
- cursor postion in multibyte mode, but a buffer index when not in a
- multibyte locale. */
- _rl_move_cursor_relative (od, old);
-
-#if defined (HANDLE_MULTIBYTE)
- /* We need to indicate that the cursor position is correct in the presence of
- invisible characters in the prompt string. Let's see if setting this when
- we make sure we're at the end of the drawn prompt string works. */
- if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 &&
- (_rl_last_c_pos > 0 || o_cpos > 0) &&
- _rl_last_c_pos == prompt_physical_chars)
- cpos_adjusted = 1;
-#endif
-
- /* if (len (new) > len (old))
- lendiff == difference in buffer (bytes)
- col_lendiff == difference on screen (columns)
- When not using multibyte characters, these are equal */
- lendiff = (nls - nfd) - (ols - ofd);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- col_lendiff = _rl_col_width (new, nfd - new, nls - new, 1) - _rl_col_width (old, ofd - old, ols - old, 1);
- else
- col_lendiff = lendiff;
-
- /* If we are changing the number of invisible characters in a line, and
- the spot of first difference is before the end of the invisible chars,
- lendiff needs to be adjusted. */
- if (current_line == 0 && !_rl_horizontal_scroll_mode &&
- current_invis_chars != visible_wrap_offset)
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- lendiff += visible_wrap_offset - current_invis_chars;
- col_lendiff += visible_wrap_offset - current_invis_chars;
- }
- else
- {
- lendiff += visible_wrap_offset - current_invis_chars;
- col_lendiff = lendiff;
- }
- }
-
- /* We use temp as a count of the number of bytes from the first difference
- to the end of the new line. col_temp is the corresponding number of
- screen columns. A `dumb' update moves to the spot of first difference
- and writes TEMP bytes. */
- /* Insert (diff (len (old), len (new)) ch. */
- temp = ne - nfd;
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- col_temp = _rl_col_width (new, nfd - new, ne - new, 1);
- else
- col_temp = temp;
-
- /* how many bytes from the new line buffer to write to the display */
- bytes_to_insert = nls - nfd;
-
- /* col_lendiff > 0 if we are adding characters to the line */
- if (col_lendiff > 0) /* XXX - was lendiff */
- {
- /* Non-zero if we're increasing the number of lines. */
- int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin;
- /* If col_lendiff is > 0, implying that the new string takes up more
- screen real estate than the old, but lendiff is < 0, meaning that it
- takes fewer bytes, we need to just output the characters starting
- from the first difference. These will overwrite what is on the
- display, so there's no reason to do a smart update. This can really
- only happen in a multibyte environment. */
- if (lendiff < 0)
- {
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp; /* XXX - was _rl_col_width (nfd, 0, temp, 1); */
- /* If nfd begins before any invisible characters in the prompt,
- adjust _rl_last_c_pos to account for wrap_offset and set
- cpos_adjusted to let the caller know. */
- if (current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- return;
- }
- /* Sometimes it is cheaper to print the characters rather than
- use the terminal's capabilities. If we're growing the number
- of lines, make sure we actually cause the new line to wrap
- around on auto-wrapping terminals. */
- else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl))
- {
- /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and
- _rl_horizontal_scroll_mode == 1, inserting the characters with
- _rl_term_IC or _rl_term_ic will screw up the screen because of the
- invisible characters. We need to just draw them. */
- /* The same thing happens if we're trying to draw before the last
- invisible character in the prompt string or we're increasing the
- number of invisible characters in the line and we're not drawing
- the entire prompt string. */
- if (*ols && ((_rl_horizontal_scroll_mode &&
- _rl_last_c_pos == 0 &&
- lendiff > prompt_visible_length &&
- current_invis_chars > 0) == 0) &&
- (((MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- current_line == 0 && wrap_offset &&
- ((nfd - new) <= prompt_last_invisible) &&
- (col_lendiff < prompt_visible_length)) == 0) &&
- (visible_wrap_offset >= current_invis_chars))
- {
- open_some_spaces (col_lendiff);
- _rl_output_some_chars (nfd, bytes_to_insert);
- _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1);
- }
- else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0)
- {
- /* At the end of a line the characters do not have to
- be "inserted". They can just be placed on the screen. */
- /* However, this screws up the rest of this block, which
- assumes you've done the insert because you can. */
- _rl_output_some_chars (nfd, lendiff);
- _rl_last_c_pos += col_lendiff;
- }
- else /* just write from first difference to end of new line */
- {
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp;
- /* If nfd begins before the last invisible character in the
- prompt, adjust _rl_last_c_pos to account for wrap_offset
- and set cpos_adjusted to let the caller know. */
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- return;
- }
-
- if (bytes_to_insert > lendiff)
- {
- /* If nfd begins before the last invisible character in the
- prompt, adjust _rl_last_c_pos to account for wrap_offset
- and set cpos_adjusted to let the caller know. */
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- }
- }
- else
- {
- /* cannot insert chars, write to EOL */
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp;
- /* If we're in a multibyte locale and were before the last invisible
- char in the current line (which implies we just output some invisible
- characters) we need to adjust _rl_last_c_pos, since it represents
- a physical character position. */
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- current_line == prompt_last_screen_line && wrap_offset &&
- displaying_prompt_first_line &&
- wrap_offset != prompt_invis_chars_first_line &&
- ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth))))
- {
- _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line;
- cpos_adjusted = 1;
- }
- }
- }
- else /* Delete characters from line. */
- {
- /* If possible and inexpensive to use terminal deletion, then do so. */
- if (_rl_term_dc && (2 * col_temp) >= -col_lendiff)
- {
- /* If all we're doing is erasing the invisible characters in the
- prompt string, don't bother. It screws up the assumptions
- about what's on the screen. */
- if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 &&
- displaying_prompt_first_line &&
- -lendiff == visible_wrap_offset)
- col_lendiff = 0;
-
- /* If we have moved lmargin and we're shrinking the line, we've
- already moved the cursor to the first character of the new line,
- so deleting -col_lendiff characters will mess up the cursor
- position calculation */
- if (_rl_horizontal_scroll_mode && displaying_prompt_first_line == 0 &&
- col_lendiff && _rl_last_c_pos < -col_lendiff)
- col_lendiff = 0;
-
- if (col_lendiff)
- delete_chars (-col_lendiff); /* delete (diff) characters */
-
- /* Copy (new) chars to screen from first diff to last match,
- overwriting what is there. */
- if (bytes_to_insert > 0)
- {
- /* If nfd begins at the prompt, or before the invisible
- characters in the prompt, we need to adjust _rl_last_c_pos
- in a multibyte locale to account for the wrap offset and
- set cpos_adjusted accordingly. */
- _rl_output_some_chars (nfd, bytes_to_insert);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1);
- if (current_line == 0 && wrap_offset &&
- displaying_prompt_first_line &&
- _rl_last_c_pos > wrap_offset &&
- ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- }
- else
- _rl_last_c_pos += bytes_to_insert;
-
- if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new)))
- goto clear_rest_of_line;
- }
- }
- /* Otherwise, print over the existing material. */
- else
- {
- if (temp > 0)
- {
- /* If nfd begins at the prompt, or before the invisible
- characters in the prompt, we need to adjust _rl_last_c_pos
- in a multibyte locale to account for the wrap offset and
- set cpos_adjusted accordingly. */
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp; /* XXX */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- if (current_line == 0 && wrap_offset &&
- displaying_prompt_first_line &&
- _rl_last_c_pos > wrap_offset &&
- ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- }
- }
-clear_rest_of_line:
- lendiff = (oe - old) - (ne - new);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- col_lendiff = _rl_col_width (old, 0, oe - old, 1) - _rl_col_width (new, 0, ne - new, 1);
- else
- col_lendiff = lendiff;
-
- /* If we've already printed over the entire width of the screen,
- including the old material, then col_lendiff doesn't matter and
- space_to_eol will insert too many spaces. XXX - maybe we should
- adjust col_lendiff based on the difference between _rl_last_c_pos
- and _rl_screenwidth */
- if (col_lendiff && ((MB_CUR_MAX == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth)))
- {
- if (_rl_term_autowrap && current_line < inv_botlin)
- space_to_eol (col_lendiff);
- else
- _rl_clear_to_eol (col_lendiff);
- }
- }
- }
-}
-
-/* Tell the update routines that we have moved onto a new (empty) line. */
-int
-rl_on_new_line ()
-{
- if (visible_line)
- visible_line[0] = '\0';
-
- _rl_last_c_pos = _rl_last_v_pos = 0;
- _rl_vis_botlin = last_lmargin = 0;
- if (vis_lbreaks)
- vis_lbreaks[0] = vis_lbreaks[1] = 0;
- visible_wrap_offset = 0;
- return 0;
-}
-
-/* Tell the update routines that we have moved onto a new line with the
- prompt already displayed. Code originally from the version of readline
- distributed with CLISP. rl_expand_prompt must have already been called
- (explicitly or implicitly). This still doesn't work exactly right. */
-int
-rl_on_new_line_with_prompt ()
-{
- int prompt_size, i, l, real_screenwidth, newlines;
- char *prompt_last_line, *lprompt;
-
- /* Initialize visible_line and invisible_line to ensure that they can hold
- the already-displayed prompt. */
- prompt_size = strlen (rl_prompt) + 1;
- init_line_structures (prompt_size);
-
- /* Make sure the line structures hold the already-displayed prompt for
- redisplay. */
- lprompt = local_prompt ? local_prompt : rl_prompt;
- strcpy (visible_line, lprompt);
- strcpy (invisible_line, lprompt);
-
- /* If the prompt contains newlines, take the last tail. */
- prompt_last_line = strrchr (rl_prompt, '\n');
- if (!prompt_last_line)
- prompt_last_line = rl_prompt;
-
- l = strlen (prompt_last_line);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l, 1); /* XXX */
- else
- _rl_last_c_pos = l;
-
- /* Dissect prompt_last_line into screen lines. Note that here we have
- to use the real screenwidth. Readline's notion of screenwidth might be
- one less, see terminal.c. */
- real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1);
- _rl_last_v_pos = l / real_screenwidth;
- /* If the prompt length is a multiple of real_screenwidth, we don't know
- whether the cursor is at the end of the last line, or already at the
- beginning of the next line. Output a newline just to be safe. */
- if (l > 0 && (l % real_screenwidth) == 0)
- _rl_output_some_chars ("\n", 1);
- last_lmargin = 0;
-
- newlines = 0; i = 0;
- while (i <= l)
- {
- _rl_vis_botlin = newlines;
- vis_lbreaks[newlines++] = i;
- i += real_screenwidth;
- }
- vis_lbreaks[newlines] = l;
- visible_wrap_offset = 0;
-
- rl_display_prompt = rl_prompt; /* XXX - make sure it's set */
-
- return 0;
-}
-
-/* Actually update the display, period. */
-int
-rl_forced_update_display ()
-{
- register char *temp;
-
- if (visible_line)
- {
- temp = visible_line;
- while (*temp)
- *temp++ = '\0';
- }
- rl_on_new_line ();
- forced_display++;
- (*rl_redisplay_function) ();
- return 0;
-}
-
-/* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices.
- (Well, when we don't have multibyte characters, _rl_last_c_pos is a
- buffer index.)
- DATA is the contents of the screen line of interest; i.e., where
- the movement is being done. */
-void
-_rl_move_cursor_relative (new, data)
- int new;
- const char *data;
-{
- register int i;
- int woff; /* number of invisible chars on current line */
- int cpos, dpos; /* current and desired cursor positions */
- int adjust;
-
- woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset);
- cpos = _rl_last_c_pos;
-
- if (cpos == 0 && cpos == new)
- return;
-
-#if defined (HANDLE_MULTIBYTE)
- /* If we have multibyte characters, NEW is indexed by the buffer point in
- a multibyte string, but _rl_last_c_pos is the display position. In
- this case, NEW's display position is not obvious and must be
- calculated. We need to account for invisible characters in this line,
- as long as we are past them and they are counted by _rl_col_width. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- adjust = 1;
- /* Try to short-circuit common cases and eliminate a bunch of multibyte
- character function calls. */
- /* 1. prompt string */
- if (new == local_prompt_len && memcmp (data, local_prompt, new) == 0)
- {
- dpos = prompt_physical_chars;
- cpos_adjusted = 1;
- adjust = 0;
- }
- /* 2. prompt_string + line contents */
- else if (new > local_prompt_len && local_prompt && memcmp (data, local_prompt, local_prompt_len) == 0)
- {
- dpos = prompt_physical_chars + _rl_col_width (data, local_prompt_len, new, 1);
- cpos_adjusted = 1;
- adjust = 0;
- }
- else
- dpos = _rl_col_width (data, 0, new, 1);
-
- if (displaying_prompt_first_line == 0)
- adjust = 0;
-
- /* Use NEW when comparing against the last invisible character in the
- prompt string, since they're both buffer indices and DPOS is a
- desired display position. */
- if (adjust && ((new > prompt_last_invisible) || /* XXX - don't use woff here */
- (prompt_physical_chars >= _rl_screenwidth &&
- _rl_last_v_pos == prompt_last_screen_line &&
- wrap_offset >= woff && dpos >= woff &&
- new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset))))
- /* XXX last comparison might need to be >= */
- {
- dpos -= woff;
- /* Since this will be assigned to _rl_last_c_pos at the end (more
- precisely, _rl_last_c_pos == dpos when this function returns),
- let the caller know. */
- cpos_adjusted = 1;
- }
- }
- else
-#endif
- dpos = new;
-
- /* If we don't have to do anything, then return. */
- if (cpos == dpos)
- return;
-
- /* It may be faster to output a CR, and then move forwards instead
- of moving backwards. */
- /* i == current physical cursor position. */
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- i = _rl_last_c_pos;
- else
-#endif
- i = _rl_last_c_pos - woff;
- if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) ||
- (_rl_term_autowrap && i == _rl_screenwidth))
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif /* !__MSDOS__ */
- cpos = _rl_last_c_pos = 0;
- }
-
- if (cpos < dpos)
- {
- /* Move the cursor forward. We do it by printing the command
- to move the cursor forward if there is one, else print that
- portion of the output buffer again. Which is cheaper? */
-
- /* The above comment is left here for posterity. It is faster
- to print one character (non-control) than to print a control
- sequence telling the terminal to move forward one character.
- That kind of control is for people who don't know what the
- data is underneath the cursor. */
-
- /* However, we need a handle on where the current display position is
- in the buffer for the immediately preceding comment to be true.
- In multibyte locales, we don't currently have that info available.
- Without it, we don't know where the data we have to display begins
- in the buffer and we have to go back to the beginning of the screen
- line. In this case, we can use the terminal sequence to move forward
- if it's available. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- if (_rl_term_forward_char)
- {
- for (i = cpos; i < dpos; i++)
- tputs (_rl_term_forward_char, 1, _rl_output_character_function);
- }
- else
- {
- tputs (_rl_term_cr, 1, _rl_output_character_function);
- for (i = 0; i < new; i++)
- putc (data[i], rl_outstream);
- }
- }
- else
- for (i = cpos; i < new; i++)
- putc (data[i], rl_outstream);
- }
-
-#if defined (HANDLE_MULTIBYTE)
- /* NEW points to the buffer point, but _rl_last_c_pos is the display point.
- The byte length of the string is probably bigger than the column width
- of the string, which means that if NEW == _rl_last_c_pos, then NEW's
- display point is less than _rl_last_c_pos. */
-#endif
- else if (cpos > dpos)
- _rl_backspace (cpos - dpos);
-
- _rl_last_c_pos = dpos;
-}
-
-/* PWP: move the cursor up or down. */
-void
-_rl_move_vert (to)
- int to;
-{
- register int delta, i;
-
- if (_rl_last_v_pos == to || to > _rl_screenheight)
- return;
-
- if ((delta = to - _rl_last_v_pos) > 0)
- {
- for (i = 0; i < delta; i++)
- putc ('\n', rl_outstream);
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- _rl_last_c_pos = 0;
- }
- else
- { /* delta < 0 */
-#ifdef __DJGPP__
- int row, col;
-
- fflush (rl_outstream);
- ScreenGetCursor (&row, &col);
- ScreenSetCursor (row + delta, col);
- i = -delta;
-#else
- if (_rl_term_up && *_rl_term_up)
- for (i = 0; i < -delta; i++)
- tputs (_rl_term_up, 1, _rl_output_character_function);
-#endif /* !__DJGPP__ */
- }
-
- _rl_last_v_pos = to; /* Now TO is here */
-}
-
-/* Physically print C on rl_outstream. This is for functions which know
- how to optimize the display. Return the number of characters output. */
-int
-rl_show_char (c)
- int c;
-{
- int n = 1;
- if (META_CHAR (c) && (_rl_output_meta_chars == 0))
- {
- fprintf (rl_outstream, "M-");
- n += 2;
- c = UNMETA (c);
- }
-
-#if defined (DISPLAY_TABS)
- if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT)
-#else
- if (CTRL_CHAR (c) || c == RUBOUT)
-#endif /* !DISPLAY_TABS */
- {
- fprintf (rl_outstream, "C-");
- n += 2;
- c = CTRL_CHAR (c) ? UNCTRL (c) : '?';
- }
-
- putc (c, rl_outstream);
- fflush (rl_outstream);
- return n;
-}
-
-int
-rl_character_len (c, pos)
- register int c, pos;
-{
- unsigned char uc;
-
- uc = (unsigned char)c;
-
- if (META_CHAR (uc))
- return ((_rl_output_meta_chars == 0) ? 4 : 1);
-
- if (uc == '\t')
- {
-#if defined (DISPLAY_TABS)
- return (((pos | 7) + 1) - pos);
-#else
- return (2);
-#endif /* !DISPLAY_TABS */
- }
-
- if (CTRL_CHAR (c) || c == RUBOUT)
- return (2);
-
- return ((ISPRINT (uc)) ? 1 : 2);
-}
-/* How to print things in the "echo-area". The prompt is treated as a
- mini-modeline. */
-static int msg_saved_prompt = 0;
-
-#if defined (USE_VARARGS)
-int
-#if defined (PREFER_STDARG)
-rl_message (const char *format, ...)
-#else
-rl_message (va_alist)
- va_dcl
-#endif
-{
- va_list args;
-#if defined (PREFER_VARARGS)
- char *format;
-#endif
-#if defined (HAVE_VSNPRINTF)
- int bneed;
-#endif
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
-
- if (msg_buf == 0)
- msg_buf = xmalloc (msg_bufsiz = 128);
-
-#if defined (HAVE_VSNPRINTF)
- bneed = vsnprintf (msg_buf, msg_bufsiz - 1, format, args);
- if (bneed >= msg_bufsiz - 1)
- {
- msg_bufsiz = bneed + 1;
- msg_buf = xrealloc (msg_buf, msg_bufsiz);
- va_end (args);
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
- vsnprintf (msg_buf, msg_bufsiz - 1, format, args);
- }
-#else
- vsprintf (msg_buf, format, args);
- msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */
-#endif
- va_end (args);
-
- if (saved_local_prompt == 0)
- {
- rl_save_prompt ();
- msg_saved_prompt = 1;
- }
- else if (local_prompt != saved_local_prompt)
- {
- FREE (local_prompt);
- FREE (local_prompt_prefix);
- local_prompt = (char *)NULL;
- }
- rl_display_prompt = msg_buf;
- local_prompt = expand_prompt (msg_buf, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)NULL;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- (*rl_redisplay_function) ();
-
- return 0;
-}
-#else /* !USE_VARARGS */
-int
-rl_message (format, arg1, arg2)
- char *format;
-{
- if (msg_buf == 0)
- msg_buf = xmalloc (msg_bufsiz = 128);
-
- sprintf (msg_buf, format, arg1, arg2);
- msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */
-
- rl_display_prompt = msg_buf;
- if (saved_local_prompt == 0)
- {
- rl_save_prompt ();
- msg_saved_prompt = 1;
- }
- else if (local_prompt != saved_local_prompt)
- {
- FREE (local_prompt);
- FREE (local_prompt_prefix);
- local_prompt = (char *)NULL;
- }
- local_prompt = expand_prompt (msg_buf, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)NULL;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- (*rl_redisplay_function) ();
-
- return 0;
-}
-#endif /* !USE_VARARGS */
-
-/* How to clear things from the "echo-area". */
-int
-rl_clear_message ()
-{
- rl_display_prompt = rl_prompt;
- if (msg_saved_prompt)
- {
- rl_restore_prompt ();
- msg_saved_prompt = 0;
- }
- (*rl_redisplay_function) ();
- return 0;
-}
-
-int
-rl_reset_line_state ()
-{
- rl_on_new_line ();
-
- rl_display_prompt = rl_prompt ? rl_prompt : "";
- forced_display = 1;
- return 0;
-}
-
-void
-rl_save_prompt ()
-{
- saved_local_prompt = local_prompt;
- saved_local_prefix = local_prompt_prefix;
- saved_prefix_length = prompt_prefix_length;
- saved_local_length = local_prompt_len;
- saved_last_invisible = prompt_last_invisible;
- saved_visible_length = prompt_visible_length;
- saved_invis_chars_first_line = prompt_invis_chars_first_line;
- saved_physical_chars = prompt_physical_chars;
-
- local_prompt = local_prompt_prefix = (char *)0;
- local_prompt_len = 0;
- prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0;
- prompt_invis_chars_first_line = prompt_physical_chars = 0;
-}
-
-void
-rl_restore_prompt ()
-{
- FREE (local_prompt);
- FREE (local_prompt_prefix);
-
- local_prompt = saved_local_prompt;
- local_prompt_prefix = saved_local_prefix;
- local_prompt_len = saved_local_length;
- prompt_prefix_length = saved_prefix_length;
- prompt_last_invisible = saved_last_invisible;
- prompt_visible_length = saved_visible_length;
- prompt_invis_chars_first_line = saved_invis_chars_first_line;
- prompt_physical_chars = saved_physical_chars;
-
- /* can test saved_local_prompt to see if prompt info has been saved. */
- saved_local_prompt = saved_local_prefix = (char *)0;
- saved_local_length = 0;
- saved_last_invisible = saved_visible_length = saved_prefix_length = 0;
- saved_invis_chars_first_line = saved_physical_chars = 0;
-}
-
-char *
-_rl_make_prompt_for_search (pchar)
- int pchar;
-{
- int len;
- char *pmt, *p;
-
- rl_save_prompt ();
-
- /* We've saved the prompt, and can do anything with the various prompt
- strings we need before they're restored. We want the unexpanded
- portion of the prompt string after any final newline. */
- p = rl_prompt ? strrchr (rl_prompt, '\n') : 0;
- if (p == 0)
- {
- len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0;
- pmt = (char *)xmalloc (len + 2);
- if (len)
- strcpy (pmt, rl_prompt);
- pmt[len] = pchar;
- pmt[len+1] = '\0';
- }
- else
- {
- p++;
- len = strlen (p);
- pmt = (char *)xmalloc (len + 2);
- if (len)
- strcpy (pmt, p);
- pmt[len] = pchar;
- pmt[len+1] = '\0';
- }
-
- /* will be overwritten by expand_prompt, called from rl_message */
- prompt_physical_chars = saved_physical_chars + 1;
- return pmt;
-}
-
-/* Quick redisplay hack when erasing characters at the end of the line. */
-void
-_rl_erase_at_end_of_line (l)
- int l;
-{
- register int i;
-
- _rl_backspace (l);
- for (i = 0; i < l; i++)
- putc (' ', rl_outstream);
- _rl_backspace (l);
- for (i = 0; i < l; i++)
- visible_line[--_rl_last_c_pos] = '\0';
- rl_display_fixed++;
-}
-
-/* Clear to the end of the line. COUNT is the minimum
- number of character spaces to clear, */
-void
-_rl_clear_to_eol (count)
- int count;
-{
-#ifndef __MSDOS__
- if (_rl_term_clreol)
- tputs (_rl_term_clreol, 1, _rl_output_character_function);
- else
-#endif
- if (count)
- space_to_eol (count);
-}
-
-/* Clear to the end of the line using spaces. COUNT is the minimum
- number of character spaces to clear, */
-static void
-space_to_eol (count)
- int count;
-{
- register int i;
-
- for (i = 0; i < count; i++)
- putc (' ', rl_outstream);
-
- _rl_last_c_pos += count;
-}
-
-void
-_rl_clear_screen ()
-{
-#ifndef __DJGPP__
- if (_rl_term_clrpag)
- tputs (_rl_term_clrpag, 1, _rl_output_character_function);
- else
- rl_crlf ();
-#else
- ScreenClear ();
- ScreenSetCursor (0, 0);
-#endif /* __DJGPP__ */
-}
-
-/* Insert COUNT characters from STRING to the output stream at column COL. */
-static void
-insert_some_chars (string, count, col)
- char *string;
- int count, col;
-{
- open_some_spaces (col);
- _rl_output_some_chars (string, count);
-}
-
-/* Insert COL spaces, keeping the cursor at the same position. We follow the
- ncurses documentation and use either im/ei with explicit spaces, or IC/ic
- by itself. We assume there will either be ei or we don't need to use it. */
-static void
-open_some_spaces (col)
- int col;
-{
-#if !defined (__MSDOS__) && !defined (__MINGW32__)
- char *buffer;
- register int i;
-
- /* If IC is defined, then we do not have to "enter" insert mode. */
- if (_rl_term_IC)
- {
- buffer = tgoto (_rl_term_IC, 0, col);
- tputs (buffer, 1, _rl_output_character_function);
- }
- else if (_rl_term_im && *_rl_term_im)
- {
- tputs (_rl_term_im, 1, _rl_output_character_function);
- /* just output the desired number of spaces */
- for (i = col; i--; )
- _rl_output_character_function (' ');
- /* If there is a string to turn off insert mode, use it now. */
- if (_rl_term_ei && *_rl_term_ei)
- tputs (_rl_term_ei, 1, _rl_output_character_function);
- /* and move back the right number of spaces */
- _rl_backspace (col);
- }
- else if (_rl_term_ic && *_rl_term_ic)
- {
- /* If there is a special command for inserting characters, then
- use that first to open up the space. */
- for (i = col; i--; )
- tputs (_rl_term_ic, 1, _rl_output_character_function);
- }
-#endif /* !__MSDOS__ && !__MINGW32__ */
-}
-
-/* Delete COUNT characters from the display line. */
-static void
-delete_chars (count)
- int count;
-{
- if (count > _rl_screenwidth) /* XXX */
- return;
-
-#if !defined (__MSDOS__) && !defined (__MINGW32__)
- if (_rl_term_DC && *_rl_term_DC)
- {
- char *buffer;
- buffer = tgoto (_rl_term_DC, count, count);
- tputs (buffer, count, _rl_output_character_function);
- }
- else
- {
- if (_rl_term_dc && *_rl_term_dc)
- while (count--)
- tputs (_rl_term_dc, 1, _rl_output_character_function);
- }
-#endif /* !__MSDOS__ && !__MINGW32__ */
-}
-
-void
-_rl_update_final ()
-{
- int full_lines;
-
- full_lines = 0;
- /* If the cursor is the only thing on an otherwise-blank last line,
- compensate so we don't print an extra CRLF. */
- if (_rl_vis_botlin && _rl_last_c_pos == 0 &&
- visible_line[vis_lbreaks[_rl_vis_botlin]] == 0)
- {
- _rl_vis_botlin--;
- full_lines = 1;
- }
- _rl_move_vert (_rl_vis_botlin);
- /* If we've wrapped lines, remove the final xterm line-wrap flag. */
- if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth))
- {
- char *last_line;
-
- last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]];
- cpos_buffer_position = -1; /* don't know where we are in buffer */
- _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */
- _rl_clear_to_eol (0);
- putc (last_line[_rl_screenwidth - 1], rl_outstream);
- }
- _rl_vis_botlin = 0;
- rl_crlf ();
- fflush (rl_outstream);
- rl_display_fixed++;
-}
-
-/* Move to the start of the current line. */
-static void
-cr ()
-{
- if (_rl_term_cr)
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- _rl_last_c_pos = 0;
- }
-}
-
-/* Redraw the last line of a multi-line prompt that may possibly contain
- terminal escape sequences. Called with the cursor at column 0 of the
- line to draw the prompt on. */
-static void
-redraw_prompt (t)
- char *t;
-{
- char *oldp;
-
- oldp = rl_display_prompt;
- rl_save_prompt ();
-
- rl_display_prompt = t;
- local_prompt = expand_prompt (t, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)NULL;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
-
- rl_forced_update_display ();
-
- rl_display_prompt = oldp;
- rl_restore_prompt();
-}
-
-/* Redisplay the current line after a SIGWINCH is received. */
-void
-_rl_redisplay_after_sigwinch ()
-{
- char *t;
-
- /* Clear the last line (assuming that the screen size change will result in
- either more or fewer characters on that line only) and put the cursor at
- column 0. Make sure the right thing happens if we have wrapped to a new
- screen line. */
- if (_rl_term_cr)
- {
- _rl_move_vert (_rl_vis_botlin);
-
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- _rl_last_c_pos = 0;
-#if defined (__MSDOS__)
- space_to_eol (_rl_screenwidth);
- putc ('\r', rl_outstream);
-#else
- if (_rl_term_clreol)
- tputs (_rl_term_clreol, 1, _rl_output_character_function);
- else
- {
- space_to_eol (_rl_screenwidth);
- tputs (_rl_term_cr, 1, _rl_output_character_function);
- }
-#endif
- if (_rl_last_v_pos > 0)
- _rl_move_vert (0);
- }
- else
- rl_crlf ();
-
- /* Redraw only the last line of a multi-line prompt. */
- t = strrchr (rl_display_prompt, '\n');
- if (t)
- redraw_prompt (++t);
- else
- rl_forced_update_display ();
-}
-
-void
-_rl_clean_up_for_exit ()
-{
- if (_rl_echoing_p)
- {
- _rl_move_vert (_rl_vis_botlin);
- _rl_vis_botlin = 0;
- fflush (rl_outstream);
- rl_restart_output (1, 0);
- }
-}
-
-void
-_rl_erase_entire_line ()
-{
- cr ();
- _rl_clear_to_eol (0);
- cr ();
- fflush (rl_outstream);
-}
-
-/* return the `current display line' of the cursor -- the number of lines to
- move up to get to the first screen line of the current readline line. */
-int
-_rl_current_display_line ()
-{
- int ret, nleft;
-
- /* Find out whether or not there might be invisible characters in the
- editing buffer. */
- if (rl_display_prompt == rl_prompt)
- nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length;
- else
- nleft = _rl_last_c_pos - _rl_screenwidth;
-
- if (nleft > 0)
- ret = 1 + nleft / _rl_screenwidth;
- else
- ret = 0;
-
- return ret;
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Calculate the number of screen columns occupied by STR from START to END.
- In the case of multibyte characters with stateful encoding, we have to
- scan from the beginning of the string to take the state into account. */
-static int
-_rl_col_width (str, start, end, flags)
- const char *str;
- int start, end, flags;
-{
- wchar_t wc;
- mbstate_t ps;
- int tmp, point, width, max;
-
- if (end <= start)
- return 0;
- if (MB_CUR_MAX == 1 || rl_byte_oriented)
-{
-_rl_ttymsg ("_rl_col_width: called with MB_CUR_MAX == 1");
- return (end - start);
-}
-
- memset (&ps, 0, sizeof (mbstate_t));
-
- point = 0;
- max = end;
-
- /* Try to short-circuit common cases. The adjustment to remove wrap_offset
- is done by the caller. */
- /* 1. prompt string */
- if (flags && start == 0 && end == local_prompt_len && memcmp (str, local_prompt, local_prompt_len) == 0)
- return (prompt_physical_chars + wrap_offset);
- /* 2. prompt string + line contents */
- else if (flags && start == 0 && local_prompt_len > 0 && end > local_prompt_len && local_prompt && memcmp (str, local_prompt, local_prompt_len) == 0)
- {
- tmp = prompt_physical_chars + wrap_offset;
- /* XXX - try to call ourselves recursively with non-prompt portion */
- tmp += _rl_col_width (str, local_prompt_len, end, flags);
- return (tmp);
- }
-
- while (point < start)
- {
- tmp = mbrlen (str + point, max, &ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* In this case, the bytes are invalid or too short to compose a
- multibyte character, so we assume that the first byte represents
- a single character. */
- point++;
- max--;
-
- /* Clear the state of the byte sequence, because in this case the
- effect of mbstate is undefined. */
- memset (&ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (tmp))
- break; /* Found '\0' */
- else
- {
- point += tmp;
- max -= tmp;
- }
- }
-
- /* If START is not a byte that starts a character, then POINT will be
- greater than START. In this case, assume that (POINT - START) gives
- a byte count that is the number of columns of difference. */
- width = point - start;
-
- while (point < end)
- {
- tmp = mbrtowc (&wc, str + point, max, &ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* In this case, the bytes are invalid or too short to compose a
- multibyte character, so we assume that the first byte represents
- a single character. */
- point++;
- max--;
-
- /* and assume that the byte occupies a single column. */
- width++;
-
- /* Clear the state of the byte sequence, because in this case the
- effect of mbstate is undefined. */
- memset (&ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (tmp))
- break; /* Found '\0' */
- else
- {
- point += tmp;
- max -= tmp;
- tmp = WCWIDTH(wc);
- width += (tmp >= 0) ? tmp : 1;
- }
- }
-
- width += point - end;
-
- return width;
-}
-#endif /* HANDLE_MULTIBYTE */
+++ /dev/null
-# This makefile for Readline library documentation is in -*- text -*- mode.
-# Emacs likes it that way.
-RM = rm -f
-
-MAKEINFO = makeinfo
-TEXI2DVI = texi2dvi
-TEXI2HTML = texi2html
-QUIETPS = #set this to -q to shut up dvips
-DVIPS = dvips -D 300 $(QUIETPS) -o $@ # tricky
-
-INSTALL_DATA = cp
-infodir = /usr/local/info
-
-RLSRC = rlman.texinfo rluser.texinfo rltech.texinfo
-HISTSRC = hist.texinfo hsuser.texinfo hstech.texinfo
-
-DVIOBJ = readline.dvi history.dvi
-INFOOBJ = readline.info history.info
-PSOBJ = readline.ps history.ps
-HTMLOBJ = readline.html history.html
-
-all: info dvi html ps
-nodvi: info html
-
-readline.dvi: $(RLSRC)
- $(TEXI2DVI) rlman.texinfo
- mv rlman.dvi readline.dvi
-
-readline.info: $(RLSRC)
- $(MAKEINFO) --no-split -o $@ rlman.texinfo
-
-history.dvi: ${HISTSRC}
- $(TEXI2DVI) hist.texinfo
- mv hist.dvi history.dvi
-
-history.info: ${HISTSRC}
- $(MAKEINFO) --no-split -o $@ hist.texinfo
-
-readline.ps: readline.dvi
- $(RM) $@
- $(DVIPS) readline.dvi
-
-history.ps: history.dvi
- $(RM) $@
- $(DVIPS) history.dvi
-
-readline.html: ${RLSRC}
- $(TEXI2HTML) rlman.texinfo
- sed -e 's:rlman.html:readline.html:' -e 's:rlman_toc.html:readline_toc.html:' rlman.html > readline.html
- sed -e 's:rlman.html:readline.html:' -e 's:rlman_toc.html:readline_toc.html:' rlman_toc.html > readline_toc.html
- $(RM) rlman.html rlman_toc.html
-
-history.html: ${HISTSRC}
- $(TEXI2HTML) hist.texinfo
- sed -e 's:hist.html:history.html:' -e 's:hist_toc.html:history_toc.html:' hist.html > history.html
- sed -e 's:hist.html:history.html:' -e 's:hist_toc.html:history_toc.html:' hist_toc.html > history_toc.html
- $(RM) hist.html hist_toc.html
-
-info: $(INFOOBJ)
-dvi: $(DVIOBJ)
-ps: $(PSOBJ)
-html: $(HTMLOBJ)
-
-clean:
- $(RM) *.aux *.cp *.fn *.ky *.log *.pg *.toc *.tp *.vr *.cps *.pgs \
- *.fns *.kys *.tps *.vrs *.o core
-
-distclean: clean
-mostlyclean: clean
-
-maintainer-clean: clean
- $(RM) *.dvi *.info *.info-* *.ps *.html
-
-install: info
- ${INSTALL_DATA} readline.info $(infodir)/readline.info
- ${INSTALL_DATA} history.info $(infodir)/history.info
+++ /dev/null
-/* quit.h -- How to handle SIGINT gracefully. */
-
-/* Copyright (C) 1993-2013 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_QUIT_H_)
-#define _QUIT_H_
-
-/* Non-zero means SIGINT has already ocurred. */
-extern volatile int interrupt_state;
-extern volatile int terminating_signal;
-
-extern sig_atomic_t sigterm_received;
-
-/* Macro to call a great deal. SIGINT just sets the interrupt_state variable.
- When it is safe, put QUIT in the code, and the "interrupt" will take
- place. The same scheme is used for terminating signals (e.g., SIGHUP)
- and the terminating_signal variable. That calls a function which will
- end up exiting the shell. */
-#define QUIT \
- do { \
- if (terminating_signal) termsig_handler (terminating_signal); \
- if (interrupt_state) throw_to_top_level (); \
- } while (0)
-
-#define CHECK_ALRM \
- do { \
- if (sigalrm_seen) \
- longjmp (alrmbuf, 1); \
- } while (0)
-
-#define SETINTERRUPT interrupt_state = 1
-#define CLRINTERRUPT interrupt_state = 0
-
-#define ADDINTERRUPT interrupt_state++
-#define DELINTERRUPT interrupt_state--
-
-/* The same sort of thing, this time just for signals that would ordinarily
- cause the shell to terminate. */
-
-#define CHECK_TERMSIG \
- do { \
- if (terminating_signal) termsig_handler (terminating_signal); \
- } while (0)
-
-#define LASTSIG() \
- (terminating_signal ? terminating_signal : (interrupt_state ? SIGINT : 0))
-
-#define CHECK_WAIT_INTR \
- do { \
- if (wait_signal_received && this_shell_builtin && (this_shell_builtin == wait_builtin)) \
- longjmp (wait_intr_buf, 1); \
- } while (0)
-
-#define RESET_SIGTERM \
- do { \
- sigterm_received = 0; \
- } while (0)
-
-#define CHECK_SIGTERM \
- do { \
- if (sigterm_received) termsig_handler (SIGTERM); \
- } while (0)
-#endif /* _QUIT_H_ */
+++ /dev/null
-/* sig.c - interface for shell signal handlers and signal initialization. */
-
-/* Copyright (C) 1994-2013 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-
-#if defined (HAVE_UNISTD_H)
-# ifdef _MINIX
-# include <sys/types.h>
-# endif
-# include <unistd.h>
-#endif
-
-#include <stdio.h>
-#include <signal.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#if defined (JOB_CONTROL)
-#include "jobs.h"
-#endif /* JOB_CONTROL */
-#include "siglist.h"
-#include "sig.h"
-#include "trap.h"
-
-#include "builtins/common.h"
-
-#if defined (READLINE)
-# include "bashline.h"
-# include <readline/readline.h>
-#endif
-
-#if defined (HISTORY)
-# include "bashhist.h"
-#endif
-
-extern int last_command_exit_value;
-extern int last_command_exit_signal;
-extern int return_catch_flag;
-extern int loop_level, continuing, breaking, funcnest;
-extern int executing_list;
-extern int comsub_ignore_return;
-extern int parse_and_execute_level, shell_initialized;
-#if defined (HISTORY)
-extern int history_lines_this_session;
-#endif
-extern int no_line_editing;
-
-extern void initialize_siglist ();
-
-/* Non-zero after SIGINT. */
-volatile int interrupt_state = 0;
-
-/* Non-zero after SIGWINCH */
-volatile int sigwinch_received = 0;
-
-/* Set to the value of any terminating signal received. */
-volatile int terminating_signal = 0;
-
-sig_atomic_t sigterm_received = 0;
-
-/* The environment at the top-level R-E loop. We use this in
- the case of error return. */
-procenv_t top_level;
-
-#if defined (JOB_CONTROL) || defined (HAVE_POSIX_SIGNALS)
-/* The signal masks that this shell runs with. */
-sigset_t top_level_mask;
-#endif /* JOB_CONTROL */
-
-/* When non-zero, we throw_to_top_level (). */
-int interrupt_immediately = 0;
-
-/* When non-zero, we call the terminating signal handler immediately. */
-int terminate_immediately = 0;
-
-#if defined (SIGWINCH)
-static SigHandler *old_winch = (SigHandler *)SIG_DFL;
-#endif
-
-static void initialize_shell_signals __P((void));
-
-void
-initialize_signals (reinit)
- int reinit;
-{
- initialize_shell_signals ();
- initialize_job_signals ();
-#if !defined (HAVE_SYS_SIGLIST) && !defined (HAVE_UNDER_SYS_SIGLIST) && !defined (HAVE_STRSIGNAL)
- if (reinit == 0)
- initialize_siglist ();
-#endif /* !HAVE_SYS_SIGLIST && !HAVE_UNDER_SYS_SIGLIST && !HAVE_STRSIGNAL */
-}
-
-/* A structure describing a signal that terminates the shell if not
- caught. The orig_handler member is present so children can reset
- these signals back to their original handlers. */
-struct termsig {
- int signum;
- SigHandler *orig_handler;
- int orig_flags;
-};
-
-#define NULL_HANDLER (SigHandler *)SIG_DFL
-
-/* The list of signals that would terminate the shell if not caught.
- We catch them, but just so that we can write the history file,
- and so forth. */
-static struct termsig terminating_signals[] = {
-#ifdef SIGHUP
-{ SIGHUP, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGINT
-{ SIGINT, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGILL
-{ SIGILL, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGTRAP
-{ SIGTRAP, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGIOT
-{ SIGIOT, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGDANGER
-{ SIGDANGER, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGEMT
-{ SIGEMT, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGFPE
-{ SIGFPE, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGBUS
-{ SIGBUS, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGSEGV
-{ SIGSEGV, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGSYS
-{ SIGSYS, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGPIPE
-{ SIGPIPE, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGALRM
-{ SIGALRM, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGTERM
-{ SIGTERM, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGXCPU
-{ SIGXCPU, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGXFSZ
-{ SIGXFSZ, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGVTALRM
-{ SIGVTALRM, NULL_HANDLER, 0 },
-#endif
-
-#if 0
-#ifdef SIGPROF
-{ SIGPROF, NULL_HANDLER, 0 },
-#endif
-#endif
-
-#ifdef SIGLOST
-{ SIGLOST, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGUSR1
-{ SIGUSR1, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGUSR2
-{ SIGUSR2, NULL_HANDLER, 0 },
-#endif
-};
-
-#define TERMSIGS_LENGTH (sizeof (terminating_signals) / sizeof (struct termsig))
-
-#define XSIG(x) (terminating_signals[x].signum)
-#define XHANDLER(x) (terminating_signals[x].orig_handler)
-#define XSAFLAGS(x) (terminating_signals[x].orig_flags)
-
-static int termsigs_initialized = 0;
-
-/* Initialize signals that will terminate the shell to do some
- unwind protection. For non-interactive shells, we only call
- this when a trap is defined for EXIT (0) or when trap is run
- to display signal dispositions. */
-void
-initialize_terminating_signals ()
-{
- register int i;
-#if defined (HAVE_POSIX_SIGNALS)
- struct sigaction act, oact;
-#endif
-
- if (termsigs_initialized)
- return;
-
- /* The following code is to avoid an expensive call to
- set_signal_handler () for each terminating_signals. Fortunately,
- this is possible in Posix. Unfortunately, we have to call signal ()
- on non-Posix systems for each signal in terminating_signals. */
-#if defined (HAVE_POSIX_SIGNALS)
- act.sa_handler = termsig_sighandler;
- act.sa_flags = 0;
- sigemptyset (&act.sa_mask);
- sigemptyset (&oact.sa_mask);
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- sigaddset (&act.sa_mask, XSIG (i));
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* If we've already trapped it, don't do anything. */
- if (signal_is_trapped (XSIG (i)))
- continue;
-
- sigaction (XSIG (i), &act, &oact);
- XHANDLER(i) = oact.sa_handler;
- XSAFLAGS(i) = oact.sa_flags;
- /* Don't do anything with signals that are ignored at shell entry
- if the shell is not interactive. */
- /* XXX - should we do this for interactive shells, too? */
- if (interactive_shell == 0 && XHANDLER (i) == SIG_IGN)
- {
- sigaction (XSIG (i), &oact, &act);
- set_signal_ignored (XSIG (i));
- }
-#if defined (SIGPROF) && !defined (_MINIX)
- if (XSIG (i) == SIGPROF && XHANDLER (i) != SIG_DFL && XHANDLER (i) != SIG_IGN)
- sigaction (XSIG (i), &oact, (struct sigaction *)NULL);
-#endif /* SIGPROF && !_MINIX */
- }
-
-#else /* !HAVE_POSIX_SIGNALS */
-
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* If we've already trapped it, don't do anything. */
- if (signal_is_trapped (XSIG (i)))
- continue;
-
- XHANDLER(i) = signal (XSIG (i), termsig_sighandler);
- XSAFLAGS(i) = 0;
- /* Don't do anything with signals that are ignored at shell entry
- if the shell is not interactive. */
- /* XXX - should we do this for interactive shells, too? */
- if (interactive_shell == 0 && XHANDLER (i) == SIG_IGN)
- {
- signal (XSIG (i), SIG_IGN);
- set_signal_ignored (XSIG (i));
- }
-#ifdef SIGPROF
- if (XSIG (i) == SIGPROF && XHANDLER (i) != SIG_DFL && XHANDLER (i) != SIG_IGN)
- signal (XSIG (i), XHANDLER (i));
-#endif
- }
-
-#endif /* !HAVE_POSIX_SIGNALS */
-
- termsigs_initialized = 1;
-}
-
-static void
-initialize_shell_signals ()
-{
- if (interactive)
- initialize_terminating_signals ();
-
-#if defined (JOB_CONTROL) || defined (HAVE_POSIX_SIGNALS)
- /* All shells use the signal mask they inherit, and pass it along
- to child processes. Children will never block SIGCHLD, though. */
- sigemptyset (&top_level_mask);
- sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &top_level_mask);
-# if defined (SIGCHLD)
- sigdelset (&top_level_mask, SIGCHLD);
-# endif
-#endif /* JOB_CONTROL || HAVE_POSIX_SIGNALS */
-
- /* And, some signals that are specifically ignored by the shell. */
- set_signal_handler (SIGQUIT, SIG_IGN);
-
- if (interactive)
- {
- set_signal_handler (SIGINT, sigint_sighandler);
- get_original_signal (SIGTERM);
- if (signal_is_hard_ignored (SIGTERM) == 0)
- set_signal_handler (SIGTERM, sigterm_sighandler);
- set_sigwinch_handler ();
- }
-}
-
-void
-reset_terminating_signals ()
-{
- register int i;
-#if defined (HAVE_POSIX_SIGNALS)
- struct sigaction act;
-#endif
-
- if (termsigs_initialized == 0)
- return;
-
-#if defined (HAVE_POSIX_SIGNALS)
- act.sa_flags = 0;
- sigemptyset (&act.sa_mask);
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* Skip a signal if it's trapped or handled specially, because the
- trap code will restore the correct value. */
- if (signal_is_trapped (XSIG (i)) || signal_is_special (XSIG (i)))
- continue;
-
- act.sa_handler = XHANDLER (i);
- act.sa_flags = XSAFLAGS (i);
- sigaction (XSIG (i), &act, (struct sigaction *) NULL);
- }
-#else /* !HAVE_POSIX_SIGNALS */
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- if (signal_is_trapped (XSIG (i)) || signal_is_special (XSIG (i)))
- continue;
-
- signal (XSIG (i), XHANDLER (i));
- }
-#endif /* !HAVE_POSIX_SIGNALS */
-
- termsigs_initialized = 0;
-}
-#undef XSIG
-#undef XHANDLER
-
-/* Run some of the cleanups that should be performed when we run
- jump_to_top_level from a builtin command context. XXX - might want to
- also call reset_parser here. */
-void
-top_level_cleanup ()
-{
- /* Clean up string parser environment. */
- while (parse_and_execute_level)
- parse_and_execute_cleanup ();
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- run_unwind_protects ();
- loop_level = continuing = breaking = funcnest = 0;
- executing_list = comsub_ignore_return = return_catch_flag = 0;
-}
-
-/* What to do when we've been interrupted, and it is safe to handle it. */
-void
-throw_to_top_level ()
-{
- int print_newline = 0;
-
- if (interrupt_state)
- {
- if (last_command_exit_value < 128)
- last_command_exit_value = 128 + SIGINT;
- print_newline = 1;
- DELINTERRUPT;
- }
-
- if (interrupt_state)
- return;
-
- last_command_exit_signal = (last_command_exit_value > 128) ?
- (last_command_exit_value - 128) : 0;
- last_command_exit_value |= 128;
-
- /* Run any traps set on SIGINT. */
- run_interrupt_trap ();
-
- /* Clean up string parser environment. */
- while (parse_and_execute_level)
- parse_and_execute_cleanup ();
-
-#if defined (JOB_CONTROL)
- give_terminal_to (shell_pgrp, 0);
-#endif /* JOB_CONTROL */
-
-#if defined (JOB_CONTROL) || defined (HAVE_POSIX_SIGNALS)
- /* This needs to stay because jobs.c:make_child() uses it without resetting
- the signal mask. */
- sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
-#endif
-
- reset_parser ();
-
-#if defined (READLINE)
- if (interactive)
- bashline_reset ();
-#endif /* READLINE */
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- run_unwind_protects ();
- loop_level = continuing = breaking = funcnest = 0;
- executing_list = comsub_ignore_return = return_catch_flag = 0;
-
- if (interactive && print_newline)
- {
- fflush (stdout);
- fprintf (stderr, "\n");
- fflush (stderr);
- }
-
- /* An interrupted `wait' command in a script does not exit the script. */
- if (interactive || (interactive_shell && !shell_initialized) ||
- (print_newline && signal_is_trapped (SIGINT)))
- jump_to_top_level (DISCARD);
- else
- jump_to_top_level (EXITPROG);
-}
-
-/* This is just here to isolate the longjmp calls. */
-void
-jump_to_top_level (value)
- int value;
-{
- longjmp (top_level, value);
-}
-
-sighandler
-termsig_sighandler (sig)
- int sig;
-{
- /* If we get called twice with the same signal before handling it,
- terminate right away. */
- if (
-#ifdef SIGHUP
- sig != SIGHUP &&
-#endif
-#ifdef SIGINT
- sig != SIGINT &&
-#endif
-#ifdef SIGDANGER
- sig != SIGDANGER &&
-#endif
-#ifdef SIGPIPE
- sig != SIGPIPE &&
-#endif
-#ifdef SIGALRM
- sig != SIGALRM &&
-#endif
-#ifdef SIGTERM
- sig != SIGTERM &&
-#endif
-#ifdef SIGXCPU
- sig != SIGXCPU &&
-#endif
-#ifdef SIGXFSZ
- sig != SIGXFSZ &&
-#endif
-#ifdef SIGVTALRM
- sig != SIGVTALRM &&
-#endif
-#ifdef SIGLOST
- sig != SIGLOST &&
-#endif
-#ifdef SIGUSR1
- sig != SIGUSR1 &&
-#endif
-#ifdef SIGUSR2
- sig != SIGUSR2 &&
-#endif
- sig == terminating_signal)
- terminate_immediately = 1;
-
- terminating_signal = sig;
-
- /* XXX - should this also trigger when interrupt_immediately is set? */
- if (terminate_immediately)
- {
-#if defined (HISTORY)
- /* XXX - will inhibit history file being written */
-# if defined (READLINE)
- if (interactive_shell == 0 || interactive == 0 || (sig != SIGHUP && sig != SIGTERM) || no_line_editing || (RL_ISSTATE (RL_STATE_READCMD) == 0))
-# endif
- history_lines_this_session = 0;
-#endif
- terminate_immediately = 0;
- termsig_handler (sig);
- }
-
-#if defined (READLINE)
- /* Set the event hook so readline will call it after the signal handlers
- finish executing, so if this interrupted character input we can get
- quick response. */
- if (interactive_shell && interactive && no_line_editing == 0)
- bashline_set_event_hook ();
-#endif
-
- SIGRETURN (0);
-}
-
-void
-termsig_handler (sig)
- int sig;
-{
- static int handling_termsig = 0;
-
- /* Simple semaphore to keep this function from being executed multiple
- times. Since we no longer are running as a signal handler, we don't
- block multiple occurrences of the terminating signals while running. */
- if (handling_termsig)
- return;
- handling_termsig = 1;
- terminating_signal = 0; /* keep macro from re-testing true. */
-
- /* I don't believe this condition ever tests true. */
- if (sig == SIGINT && signal_is_trapped (SIGINT))
- run_interrupt_trap ();
-
-#if defined (HISTORY)
- /* If we don't do something like this, the history will not be saved when
- an interactive shell is running in a terminal window that gets closed
- with the `close' button. We can't test for RL_STATE_READCMD because
- readline no longer handles SIGTERM synchronously. */
- if (interactive_shell && interactive && sig == SIGHUP && remember_on_history)
- maybe_save_shell_history ();
-#endif /* HISTORY */
-
-#if defined (JOB_CONTROL)
- if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
- hangup_all_jobs ();
- end_job_control ();
-#endif /* JOB_CONTROL */
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- /* Reset execution context */
- loop_level = continuing = breaking = funcnest = 0;
- executing_list = comsub_ignore_return = return_catch_flag = 0;
-
- run_exit_trap ();
- set_signal_handler (sig, SIG_DFL);
- kill (getpid (), sig);
-}
-
-/* What we really do when SIGINT occurs. */
-sighandler
-sigint_sighandler (sig)
- int sig;
-{
-#if defined (MUST_REINSTALL_SIGHANDLERS)
- signal (sig, sigint_sighandler);
-#endif
-
- /* interrupt_state needs to be set for the stack of interrupts to work
- right. Should it be set unconditionally? */
- if (interrupt_state == 0)
- ADDINTERRUPT;
-
- if (interrupt_immediately)
- {
- interrupt_immediately = 0;
- last_command_exit_value = 128 + sig;
- throw_to_top_level ();
- }
-#if defined (READLINE)
- /* Set the event hook so readline will call it after the signal handlers
- finish executing, so if this interrupted character input we can get
- quick response. */
- else if (RL_ISSTATE (RL_STATE_SIGHANDLER))
- bashline_set_event_hook ();
-#endif
-
- SIGRETURN (0);
-}
-
-#if defined (SIGWINCH)
-sighandler
-sigwinch_sighandler (sig)
- int sig;
-{
-#if defined (MUST_REINSTALL_SIGHANDLERS)
- set_signal_handler (SIGWINCH, sigwinch_sighandler);
-#endif /* MUST_REINSTALL_SIGHANDLERS */
- sigwinch_received = 1;
- SIGRETURN (0);
-}
-#endif /* SIGWINCH */
-
-void
-set_sigwinch_handler ()
-{
-#if defined (SIGWINCH)
- old_winch = set_signal_handler (SIGWINCH, sigwinch_sighandler);
-#endif
-}
-
-void
-unset_sigwinch_handler ()
-{
-#if defined (SIGWINCH)
- set_signal_handler (SIGWINCH, old_winch);
-#endif
-}
-
-sighandler
-sigterm_sighandler (sig)
- int sig;
-{
- sigterm_received = 1; /* XXX - counter? */
- SIGRETURN (0);
-}
-
-/* Signal functions used by the rest of the code. */
-#if !defined (HAVE_POSIX_SIGNALS)
-
-/* Perform OPERATION on NEWSET, perhaps leaving information in OLDSET. */
-sigprocmask (operation, newset, oldset)
- int operation, *newset, *oldset;
-{
- int old, new;
-
- if (newset)
- new = *newset;
- else
- new = 0;
-
- switch (operation)
- {
- case SIG_BLOCK:
- old = sigblock (new);
- break;
-
- case SIG_SETMASK:
- old = sigsetmask (new);
- break;
-
- default:
- internal_error (_("sigprocmask: %d: invalid operation"), operation);
- }
-
- if (oldset)
- *oldset = old;
-}
-
-#else
-
-#if !defined (SA_INTERRUPT)
-# define SA_INTERRUPT 0
-#endif
-
-#if !defined (SA_RESTART)
-# define SA_RESTART 0
-#endif
-
-SigHandler *
-set_signal_handler (sig, handler)
- int sig;
- SigHandler *handler;
-{
- struct sigaction act, oact;
-
- act.sa_handler = handler;
- act.sa_flags = 0;
-
- /* XXX - bash-4.2 */
- /* We don't want a child death to interrupt interruptible system calls, even
- if we take the time to reap children */
-#if defined (SIGCHLD)
- if (sig == SIGCHLD)
- act.sa_flags |= SA_RESTART; /* XXX */
-#endif
- /* If we're installing a SIGTERM handler for interactive shells, we want
- it to be as close to SIG_IGN as possible. */
- if (sig == SIGTERM && handler == sigterm_sighandler)
- act.sa_flags |= SA_RESTART; /* XXX */
-
- sigemptyset (&act.sa_mask);
- sigemptyset (&oact.sa_mask);
- sigaction (sig, &act, &oact);
- return (oact.sa_handler);
-}
-#endif /* HAVE_POSIX_SIGNALS */
+++ /dev/null
-/* sig.h -- header file for signal handler definitions. */
-
-/* Copyright (C) 1994-2013 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* Make sure that this is included *after* config.h! */
-
-#if !defined (_SIG_H_)
-# define _SIG_H_
-
-#include "stdc.h"
-
-#if !defined (SIG_DFL)
-# include <signal.h>
-#endif
-
-#if !defined (SIGABRT) && defined (SIGIOT)
-# define SIGABRT SIGIOT
-#endif
-
-#define sighandler RETSIGTYPE
-typedef RETSIGTYPE SigHandler __P((int));
-
-#if defined (VOID_SIGHANDLER)
-# define SIGRETURN(n) return
-#else
-# define SIGRETURN(n) return(n)
-#endif /* !VOID_SIGHANDLER */
-
-/* Here is a definition for set_signal_handler () which simply expands to
- a call to signal () for non-Posix systems. The code for set_signal_handler
- in the Posix case resides in general.c. */
-#if !defined (HAVE_POSIX_SIGNALS)
-# define set_signal_handler(sig, handler) (SigHandler *)signal (sig, handler)
-#else
-extern SigHandler *set_signal_handler __P((int, SigHandler *)); /* in sig.c */
-#endif /* _POSIX_VERSION */
-
-#if !defined (SIGCHLD) && defined (SIGCLD)
-# define SIGCHLD SIGCLD
-#endif
-
-#if !defined (HAVE_POSIX_SIGNALS) && !defined (sigmask)
-# define sigmask(x) (1 << ((x)-1))
-#endif /* !HAVE_POSIX_SIGNALS && !sigmask */
-
-#if !defined (HAVE_POSIX_SIGNALS)
-# if !defined (SIG_BLOCK)
-# define SIG_BLOCK 2
-# define SIG_SETMASK 3
-# endif /* SIG_BLOCK */
-
-/* sigset_t defined in config.h */
-
-/* Make sure there is nothing inside the signal set. */
-# define sigemptyset(set) (*(set) = 0)
-
-/* Initialize the signal set to hold all signals. */
-# define sigfillset(set) (*set) = sigmask (NSIG) - 1
-
-/* Add SIG to the contents of SET. */
-# define sigaddset(set, sig) *(set) |= sigmask (sig)
-
-/* Delete SIG from signal set SET. */
-# define sigdelset(set, sig) *(set) &= ~sigmask (sig)
-
-/* Is SIG a member of the signal set SET? */
-# define sigismember(set, sig) ((*(set) & sigmask (sig)) != 0)
-
-/* Suspend the process until the reception of one of the signals
- not present in SET. */
-# define sigsuspend(set) sigpause (*(set))
-#endif /* !HAVE_POSIX_SIGNALS */
-
-/* These definitions are used both in POSIX and non-POSIX implementations. */
-
-#define BLOCK_SIGNAL(sig, nvar, ovar) \
-do { \
- sigemptyset (&nvar); \
- sigaddset (&nvar, sig); \
- sigemptyset (&ovar); \
- sigprocmask (SIG_BLOCK, &nvar, &ovar); \
-} while (0)
-
-#define UNBLOCK_SIGNAL(ovar) sigprocmask (SIG_SETMASK, &ovar, (sigset_t *) NULL)
-
-#if defined (HAVE_POSIX_SIGNALS)
-# define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar)
-# define UNBLOCK_CHILD(ovar) UNBLOCK_SIGNAL(ovar)
-#else /* !HAVE_POSIX_SIGNALS */
-# define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD))
-# define UNBLOCK_CHILD(ovar) sigsetmask (ovar)
-#endif /* !HAVE_POSIX_SIGNALS */
-
-/* Extern variables */
-extern sig_atomic_t sigwinch_received;
-extern sig_atomic_t sigterm_received;
-
-extern int interrupt_immediately;
-extern int terminate_immediately;
-
-/* Functions from sig.c. */
-extern sighandler termsig_sighandler __P((int));
-extern void termsig_handler __P((int));
-extern sighandler sigint_sighandler __P((int));
-extern void initialize_signals __P((int));
-extern void initialize_terminating_signals __P((void));
-extern void reset_terminating_signals __P((void));
-extern void top_level_cleanup __P((void));
-extern void throw_to_top_level __P((void));
-extern void jump_to_top_level __P((int)) __attribute__((__noreturn__));
-
-extern sighandler sigwinch_sighandler __P((int));
-extern void set_sigwinch_handler __P((void));
-extern void unset_sigwinch_handler __P((void));
-
-extern sighandler sigterm_sighandler __P((int));
-
-/* Functions defined in trap.c. */
-extern SigHandler *set_sigint_handler __P((void));
-extern SigHandler *trap_to_sighandler __P((int));
-extern sighandler trap_handler __P((int));
-
-#endif /* _SIG_H_ */
+++ /dev/null
-/* subst.c -- The part of the shell that does parameter, command, arithmetic,
- and globbing substitutions. */
-
-/* ``Have a little faith, there's magic in the night. You ain't a
- beauty, but, hey, you're alright.'' */
-
-/* Copyright (C) 1987-2013 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include <stdio.h>
-#include "chartypes.h"
-#if defined (HAVE_PWD_H)
-# include <pwd.h>
-#endif
-#include <signal.h>
-#include <errno.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashansi.h"
-#include "posixstat.h"
-#include "bashintl.h"
-
-#include "shell.h"
-#include "parser.h"
-#include "flags.h"
-#include "jobs.h"
-#include "execute_cmd.h"
-#include "filecntl.h"
-#include "trap.h"
-#include "pathexp.h"
-#include "mailcheck.h"
-
-#include "shmbutil.h"
-#include "typemax.h"
-
-#include "builtins/getopt.h"
-#include "builtins/common.h"
-
-#include "builtins/builtext.h"
-
-#include <tilde/tilde.h>
-#include <glob/strmatch.h>
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-/* The size that strings change by. */
-#define DEFAULT_INITIAL_ARRAY_SIZE 112
-#define DEFAULT_ARRAY_SIZE 128
-
-/* Variable types. */
-#define VT_VARIABLE 0
-#define VT_POSPARMS 1
-#define VT_ARRAYVAR 2
-#define VT_ARRAYMEMBER 3
-#define VT_ASSOCVAR 4
-
-#define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */
-
-/* Flags for quoted_strchr */
-#define ST_BACKSL 0x01
-#define ST_CTLESC 0x02
-#define ST_SQUOTE 0x04 /* unused yet */
-#define ST_DQUOTE 0x08 /* unused yet */
-
-/* Flags for the `pflags' argument to param_expand() */
-#define PF_NOCOMSUB 0x01 /* Do not perform command substitution */
-#define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */
-#define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */
-#define PF_ASSIGNRHS 0x08 /* same as W_ASSIGNRHS */
-
-/* These defs make it easier to use the editor. */
-#define LBRACE '{'
-#define RBRACE '}'
-#define LPAREN '('
-#define RPAREN ')'
-
-#if defined (HANDLE_MULTIBYTE)
-#define WLPAREN L'('
-#define WRPAREN L')'
-#endif
-
-/* Evaluates to 1 if C is one of the shell's special parameters whose length
- can be taken, but is also one of the special expansion characters. */
-#define VALID_SPECIAL_LENGTH_PARAM(c) \
- ((c) == '-' || (c) == '?' || (c) == '#')
-
-/* Evaluates to 1 if C is one of the shell's special parameters for which an
- indirect variable reference may be made. */
-#define VALID_INDIR_PARAM(c) \
- ((posixly_correct == 0 && (c) == '#') || (posixly_correct == 0 && (c) == '?') || (c) == '@' || (c) == '*')
-
-/* Evaluates to 1 if C is one of the OP characters that follows the parameter
- in ${parameter[:]OPword}. */
-#define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP)
-
-/* Evaluates to 1 if this is one of the shell's special variables. */
-#define SPECIAL_VAR(name, wi) \
- ((DIGIT (*name) && all_digits (name)) || \
- (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \
- (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1])))
-
-/* An expansion function that takes a string and a quoted flag and returns
- a WORD_LIST *. Used as the type of the third argument to
- expand_string_if_necessary(). */
-typedef WORD_LIST *EXPFUNC __P((char *, int));
-
-/* Process ID of the last command executed within command substitution. */
-pid_t last_command_subst_pid = NO_PID;
-pid_t current_command_subst_pid = NO_PID;
-
-/* Variables used to keep track of the characters in IFS. */
-SHELL_VAR *ifs_var;
-char *ifs_value;
-unsigned char ifs_cmap[UCHAR_MAX + 1];
-int ifs_is_set, ifs_is_null;
-
-#if defined (HANDLE_MULTIBYTE)
-unsigned char ifs_firstc[MB_LEN_MAX];
-size_t ifs_firstc_len;
-#else
-unsigned char ifs_firstc;
-#endif
-
-/* Sentinel to tell when we are performing variable assignments preceding a
- command name and putting them into the environment. Used to make sure
- we use the temporary environment when looking up variable values. */
-int assigning_in_environment;
-
-/* Used to hold a list of variable assignments preceding a command. Global
- so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a
- SIGCHLD trap and so it can be saved and restored by the trap handlers. */
-WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL;
-
-/* Extern functions and variables from different files. */
-extern int last_command_exit_value, last_command_exit_signal;
-extern int subshell_environment, line_number;
-extern int subshell_level, parse_and_execute_level, sourcelevel;
-extern int eof_encountered;
-extern int return_catch_flag, return_catch_value;
-extern pid_t dollar_dollar_pid;
-extern int posixly_correct;
-extern char *this_command_name;
-extern struct fd_bitmap *current_fds_to_close;
-extern int wordexp_only;
-extern int expanding_redir;
-extern int tempenv_assign_error;
-extern int builtin_ignoring_errexit;
-
-#if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE)
-extern wchar_t *wcsdup __P((const wchar_t *));
-#endif
-
-/* Non-zero means to allow unmatched globbed filenames to expand to
- a null file. */
-int allow_null_glob_expansion;
-
-/* Non-zero means to throw an error when globbing fails to match anything. */
-int fail_glob_expansion;
-
-#if 0
-/* Variables to keep track of which words in an expanded word list (the
- output of expand_word_list_internal) are the result of globbing
- expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c.
- (CURRENTLY UNUSED). */
-char *glob_argv_flags;
-static int glob_argv_flags_size;
-#endif
-
-static WORD_LIST expand_word_error, expand_word_fatal;
-static WORD_DESC expand_wdesc_error, expand_wdesc_fatal;
-static char expand_param_error, expand_param_fatal;
-static char extract_string_error, extract_string_fatal;
-
-/* Tell the expansion functions to not longjmp back to top_level on fatal
- errors. Enabled when doing completion and prompt string expansion. */
-static int no_longjmp_on_fatal_error = 0;
-
-/* Set by expand_word_unsplit; used to inhibit splitting and re-joining
- $* on $IFS, primarily when doing assignment statements. */
-static int expand_no_split_dollar_star = 0;
-
-/* A WORD_LIST of words to be expanded by expand_word_list_internal,
- without any leading variable assignments. */
-static WORD_LIST *garglist = (WORD_LIST *)NULL;
-
-static char *quoted_substring __P((char *, int, int));
-static int quoted_strlen __P((char *));
-static char *quoted_strchr __P((char *, int, int));
-
-static char *expand_string_if_necessary __P((char *, int, EXPFUNC *));
-static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *));
-static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *));
-static WORD_LIST *expand_string_internal __P((char *, int));
-static WORD_LIST *expand_string_leave_quoted __P((char *, int));
-static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *));
-
-static WORD_LIST *list_quote_escapes __P((WORD_LIST *));
-static char *make_quoted_char __P((int));
-static WORD_LIST *quote_list __P((WORD_LIST *));
-
-static int unquoted_substring __P((char *, char *));
-static int unquoted_member __P((int, char *));
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *do_compound_assignment __P((char *, char *, int));
-#endif
-static int do_assignment_internal __P((const WORD_DESC *, int));
-
-static char *string_extract_verbatim __P((char *, size_t, int *, char *, int));
-static char *string_extract __P((char *, int *, char *, int));
-static char *string_extract_double_quoted __P((char *, int *, int));
-static inline char *string_extract_single_quoted __P((char *, int *));
-static inline int skip_single_quoted __P((const char *, size_t, int));
-static int skip_double_quoted __P((char *, size_t, int));
-static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int));
-static char *extract_dollar_brace_string __P((char *, int *, int, int));
-static int skip_matched_pair __P((const char *, int, int, int, int));
-
-static char *pos_params __P((char *, int, int, int));
-
-static unsigned char *mb_getcharlens __P((char *, int));
-
-static char *remove_upattern __P((char *, char *, int));
-#if defined (HANDLE_MULTIBYTE)
-static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int));
-#endif
-static char *remove_pattern __P((char *, char *, int));
-
-static int match_upattern __P((char *, char *, int, char **, char **));
-#if defined (HANDLE_MULTIBYTE)
-static int match_wpattern __P((wchar_t *, char **, size_t, wchar_t *, int, char **, char **));
-#endif
-static int match_pattern __P((char *, char *, int, char **, char **));
-static int getpatspec __P((int, char *));
-static char *getpattern __P((char *, int, int));
-static char *variable_remove_pattern __P((char *, char *, int, int));
-static char *list_remove_pattern __P((WORD_LIST *, char *, int, int, int));
-static char *parameter_list_remove_pattern __P((int, char *, int, int));
-#ifdef ARRAY_VARS
-static char *array_remove_pattern __P((SHELL_VAR *, char *, int, char *, int));
-#endif
-static char *parameter_brace_remove_pattern __P((char *, char *, int, char *, int, int, int));
-
-static char *process_substitute __P((char *, int));
-
-static char *read_comsub __P((int, int, int *));
-
-#ifdef ARRAY_VARS
-static arrayind_t array_length_reference __P((char *));
-#endif
-
-static int valid_brace_expansion_word __P((char *, int));
-static int chk_atstar __P((char *, int, int *, int *));
-static int chk_arithsub __P((const char *, int));
-
-static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int, arrayind_t *));
-static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *));
-static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *));
-static void parameter_brace_expand_error __P((char *, char *));
-
-static int valid_length_expression __P((char *));
-static intmax_t parameter_brace_expand_length __P((char *));
-
-static char *skiparith __P((char *, int));
-static int verify_substring_values __P((SHELL_VAR *, char *, char *, int, intmax_t *, intmax_t *));
-static int get_var_and_type __P((char *, char *, arrayind_t, int, int, SHELL_VAR **, char **));
-static char *mb_substring __P((char *, int, int));
-static char *parameter_brace_substring __P((char *, char *, int, char *, int, int));
-
-static int shouldexp_replacement __P((char *));
-
-static char *pos_params_pat_subst __P((char *, char *, char *, int));
-
-static char *parameter_brace_patsub __P((char *, char *, int, char *, int, int));
-
-static char *pos_params_casemod __P((char *, char *, int, int));
-static char *parameter_brace_casemod __P((char *, char *, int, int, char *, int, int));
-
-static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *));
-static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int));
-
-static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *));
-
-static WORD_LIST *word_list_split __P((WORD_LIST *));
-
-static void exp_jump_to_top_level __P((int));
-
-static WORD_LIST *separate_out_assignments __P((WORD_LIST *));
-static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int));
-#ifdef BRACE_EXPANSION
-static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int));
-#endif
-#if defined (ARRAY_VARS)
-static int make_internal_declare __P((char *, char *));
-#endif
-static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int));
-static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int));
-
-/* **************************************************************** */
-/* */
-/* Utility Functions */
-/* */
-/* **************************************************************** */
-
-#if defined (DEBUG)
-void
-dump_word_flags (flags)
- int flags;
-{
- int f;
-
- f = flags;
- fprintf (stderr, "%d -> ", f);
- if (f & W_ASSIGNASSOC)
- {
- f &= ~W_ASSIGNASSOC;
- fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : "");
- }
- if (f & W_ASSIGNARRAY)
- {
- f &= ~W_ASSIGNARRAY;
- fprintf (stderr, "W_ASSIGNARRAY%s", f ? "|" : "");
- }
- if (f & W_HASCTLESC)
- {
- f &= ~W_HASCTLESC;
- fprintf (stderr, "W_HASCTLESC%s", f ? "|" : "");
- }
- if (f & W_NOPROCSUB)
- {
- f &= ~W_NOPROCSUB;
- fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : "");
- }
- if (f & W_DQUOTE)
- {
- f &= ~W_DQUOTE;
- fprintf (stderr, "W_DQUOTE%s", f ? "|" : "");
- }
- if (f & W_HASQUOTEDNULL)
- {
- f &= ~W_HASQUOTEDNULL;
- fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : "");
- }
- if (f & W_ASSIGNARG)
- {
- f &= ~W_ASSIGNARG;
- fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : "");
- }
- if (f & W_ASSNBLTIN)
- {
- f &= ~W_ASSNBLTIN;
- fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : "");
- }
- if (f & W_ASSNGLOBAL)
- {
- f &= ~W_ASSNGLOBAL;
- fprintf (stderr, "W_ASSNGLOBAL%s", f ? "|" : "");
- }
- if (f & W_COMPASSIGN)
- {
- f &= ~W_COMPASSIGN;
- fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : "");
- }
- if (f & W_NOEXPAND)
- {
- f &= ~W_NOEXPAND;
- fprintf (stderr, "W_NOEXPAND%s", f ? "|" : "");
- }
- if (f & W_ITILDE)
- {
- f &= ~W_ITILDE;
- fprintf (stderr, "W_ITILDE%s", f ? "|" : "");
- }
- if (f & W_NOTILDE)
- {
- f &= ~W_NOTILDE;
- fprintf (stderr, "W_NOTILDE%s", f ? "|" : "");
- }
- if (f & W_ASSIGNRHS)
- {
- f &= ~W_ASSIGNRHS;
- fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : "");
- }
- if (f & W_NOCOMSUB)
- {
- f &= ~W_NOCOMSUB;
- fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : "");
- }
- if (f & W_DOLLARSTAR)
- {
- f &= ~W_DOLLARSTAR;
- fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : "");
- }
- if (f & W_DOLLARAT)
- {
- f &= ~W_DOLLARAT;
- fprintf (stderr, "W_DOLLARAT%s", f ? "|" : "");
- }
- if (f & W_TILDEEXP)
- {
- f &= ~W_TILDEEXP;
- fprintf (stderr, "W_TILDEEXP%s", f ? "|" : "");
- }
- if (f & W_NOSPLIT2)
- {
- f &= ~W_NOSPLIT2;
- fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : "");
- }
- if (f & W_NOSPLIT)
- {
- f &= ~W_NOSPLIT;
- fprintf (stderr, "W_NOSPLIT%s", f ? "|" : "");
- }
- if (f & W_NOBRACE)
- {
- f &= ~W_NOBRACE;
- fprintf (stderr, "W_NOBRACE%s", f ? "|" : "");
- }
- if (f & W_NOGLOB)
- {
- f &= ~W_NOGLOB;
- fprintf (stderr, "W_NOGLOB%s", f ? "|" : "");
- }
- if (f & W_SPLITSPACE)
- {
- f &= ~W_SPLITSPACE;
- fprintf (stderr, "W_SPLITSPACE%s", f ? "|" : "");
- }
- if (f & W_ASSIGNMENT)
- {
- f &= ~W_ASSIGNMENT;
- fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : "");
- }
- if (f & W_QUOTED)
- {
- f &= ~W_QUOTED;
- fprintf (stderr, "W_QUOTED%s", f ? "|" : "");
- }
- if (f & W_HASDOLLAR)
- {
- f &= ~W_HASDOLLAR;
- fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : "");
- }
- fprintf (stderr, "\n");
- fflush (stderr);
-}
-#endif
-
-#ifdef INCLUDE_UNUSED
-static char *
-quoted_substring (string, start, end)
- char *string;
- int start, end;
-{
- register int len, l;
- register char *result, *s, *r;
-
- len = end - start;
-
- /* Move to string[start], skipping quoted characters. */
- for (s = string, l = 0; *s && l < start; )
- {
- if (*s == CTLESC)
- {
- s++;
- continue;
- }
- l++;
- if (*s == 0)
- break;
- }
-
- r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */
-
- /* Copy LEN characters, including quote characters. */
- s = string + l;
- for (l = 0; l < len; s++)
- {
- if (*s == CTLESC)
- *r++ = *s++;
- *r++ = *s;
- l++;
- if (*s == 0)
- break;
- }
- *r = '\0';
- return result;
-}
-#endif
-
-#ifdef INCLUDE_UNUSED
-/* Return the length of S, skipping over quoted characters */
-static int
-quoted_strlen (s)
- char *s;
-{
- register char *p;
- int i;
-
- i = 0;
- for (p = s; *p; p++)
- {
- if (*p == CTLESC)
- {
- p++;
- if (*p == 0)
- return (i + 1);
- }
- i++;
- }
-
- return i;
-}
-#endif
-
-/* Find the first occurrence of character C in string S, obeying shell
- quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped
- characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters
- escaped with CTLESC are skipped. */
-static char *
-quoted_strchr (s, c, flags)
- char *s;
- int c, flags;
-{
- register char *p;
-
- for (p = s; *p; p++)
- {
- if (((flags & ST_BACKSL) && *p == '\\')
- || ((flags & ST_CTLESC) && *p == CTLESC))
- {
- p++;
- if (*p == '\0')
- return ((char *)NULL);
- continue;
- }
- else if (*p == c)
- return p;
- }
- return ((char *)NULL);
-}
-
-/* Return 1 if CHARACTER appears in an unquoted portion of
- STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */
-static int
-unquoted_member (character, string)
- int character;
- char *string;
-{
- size_t slen;
- int sindex, c;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- sindex = 0;
- while (c = string[sindex])
- {
- if (c == character)
- return (1);
-
- switch (c)
- {
- default:
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\\':
- sindex++;
- if (string[sindex])
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\'':
- sindex = skip_single_quoted (string, slen, ++sindex);
- break;
-
- case '"':
- sindex = skip_double_quoted (string, slen, ++sindex);
- break;
- }
- }
- return (0);
-}
-
-/* Return 1 if SUBSTR appears in an unquoted portion of STRING. */
-static int
-unquoted_substring (substr, string)
- char *substr, *string;
-{
- size_t slen;
- int sindex, c, sublen;
- DECLARE_MBSTATE;
-
- if (substr == 0 || *substr == '\0')
- return (0);
-
- slen = strlen (string);
- sublen = strlen (substr);
- for (sindex = 0; c = string[sindex]; )
- {
- if (STREQN (string + sindex, substr, sublen))
- return (1);
-
- switch (c)
- {
- case '\\':
- sindex++;
- if (string[sindex])
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\'':
- sindex = skip_single_quoted (string, slen, ++sindex);
- break;
-
- case '"':
- sindex = skip_double_quoted (string, slen, ++sindex);
- break;
-
- default:
- ADVANCE_CHAR (string, slen, sindex);
- break;
- }
- }
- return (0);
-}
-
-/* Most of the substitutions must be done in parallel. In order
- to avoid using tons of unclear goto's, I have some functions
- for manipulating malloc'ed strings. They all take INDX, a
- pointer to an integer which is the offset into the string
- where manipulation is taking place. They also take SIZE, a
- pointer to an integer which is the current length of the
- character array for this string. */
-
-/* Append SOURCE to TARGET at INDEX. SIZE is the current amount
- of space allocated to TARGET. SOURCE can be NULL, in which
- case nothing happens. Gets rid of SOURCE by freeing it.
- Returns TARGET in case the location has changed. */
-INLINE char *
-sub_append_string (source, target, indx, size)
- char *source, *target;
- int *indx, *size;
-{
- if (source)
- {
- int srclen, n;
-
- srclen = STRLEN (source);
- if (srclen >= (int)(*size - *indx))
- {
- n = srclen + *indx;
- n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE);
- target = (char *)xrealloc (target, (*size = n));
- }
-
- FASTCOPY (source, target + *indx, srclen);
- *indx += srclen;
- target[*indx] = '\0';
-
- free (source);
- }
- return (target);
-}
-
-#if 0
-/* UNUSED */
-/* Append the textual representation of NUMBER to TARGET.
- INDX and SIZE are as in SUB_APPEND_STRING. */
-char *
-sub_append_number (number, target, indx, size)
- intmax_t number;
- int *indx, *size;
- char *target;
-{
- char *temp;
-
- temp = itos (number);
- return (sub_append_string (temp, target, indx, size));
-}
-#endif
-
-/* Extract a substring from STRING, starting at SINDEX and ending with
- one of the characters in CHARLIST. Don't make the ending character
- part of the string. Leave SINDEX pointing at the ending character.
- Understand about backslashes in the string. If (flags & SX_VARNAME)
- is non-zero, and array variables have been compiled into the shell,
- everything between a `[' and a corresponding `]' is skipped over.
- If (flags & SX_NOALLOC) is non-zero, don't return the substring, just
- update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must
- contain a closing character from CHARLIST. */
-static char *
-string_extract (string, sindex, charlist, flags)
- char *string;
- int *sindex;
- char *charlist;
- int flags;
-{
- register int c, i;
- int found;
- size_t slen;
- char *temp;
- DECLARE_MBSTATE;
-
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0;
- i = *sindex;
- found = 0;
- while (c = string[i])
- {
- if (c == '\\')
- {
- if (string[i + 1])
- i++;
- else
- break;
- }
-#if defined (ARRAY_VARS)
- else if ((flags & SX_VARNAME) && c == '[')
- {
- int ni;
- /* If this is an array subscript, skip over it and continue. */
- ni = skipsubscript (string, i, 0);
- if (string[ni] == ']')
- i = ni;
- }
-#endif
- else if (MEMBER (c, charlist))
- {
- found = 1;
- break;
- }
-
- ADVANCE_CHAR (string, slen, i);
- }
-
- /* If we had to have a matching delimiter and didn't find one, return an
- error and let the caller deal with it. */
- if ((flags & SX_REQMATCH) && found == 0)
- {
- *sindex = i;
- return (&extract_string_error);
- }
-
- temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i);
- *sindex = i;
-
- return (temp);
-}
-
-/* Extract the contents of STRING as if it is enclosed in double quotes.
- SINDEX, when passed in, is the offset of the character immediately
- following the opening double quote; on exit, SINDEX is left pointing after
- the closing double quote. If STRIPDQ is non-zero, unquoted double
- quotes are stripped and the string is terminated by a null byte.
- Backslashes between the embedded double quotes are processed. If STRIPDQ
- is zero, an unquoted `"' terminates the string. */
-static char *
-string_extract_double_quoted (string, sindex, stripdq)
- char *string;
- int *sindex, stripdq;
-{
- size_t slen;
- char *send;
- int j, i, t;
- unsigned char c;
- char *temp, *ret; /* The new string we return. */
- int pass_next, backquote, si; /* State variables for the machine. */
- int dquote;
- DECLARE_MBSTATE;
-
- slen = strlen (string + *sindex) + *sindex;
- send = string + slen;
-
- pass_next = backquote = dquote = 0;
- temp = (char *)xmalloc (1 + slen - *sindex);
-
- j = 0;
- i = *sindex;
- while (c = string[i])
- {
- /* Process a character that was quoted by a backslash. */
- if (pass_next)
- {
- /* XXX - take another look at this in light of Interp 221 */
- /* Posix.2 sez:
-
- ``The backslash shall retain its special meaning as an escape
- character only when followed by one of the characters:
- $ ` " \ <newline>''.
-
- If STRIPDQ is zero, we handle the double quotes here and let
- expand_word_internal handle the rest. If STRIPDQ is non-zero,
- we have already been through one round of backslash stripping,
- and want to strip these backslashes only if DQUOTE is non-zero,
- indicating that we are inside an embedded double-quoted string. */
-
- /* If we are in an embedded quoted string, then don't strip
- backslashes before characters for which the backslash
- retains its special meaning, but remove backslashes in
- front of other characters. If we are not in an
- embedded quoted string, don't strip backslashes at all.
- This mess is necessary because the string was already
- surrounded by double quotes (and sh has some really weird
- quoting rules).
- The returned string will be run through expansion as if
- it were double-quoted. */
- if ((stripdq == 0 && c != '"') ||
- (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0)))
- temp[j++] = '\\';
- pass_next = 0;
-
-add_one_character:
- COPY_CHAR_I (temp, j, string, send, i);
- continue;
- }
-
- /* A backslash protects the next character. The code just above
- handles preserving the backslash in front of any character but
- a double quote. */
- if (c == '\\')
- {
- pass_next++;
- i++;
- continue;
- }
-
- /* Inside backquotes, ``the portion of the quoted string from the
- initial backquote and the characters up to the next backquote
- that is not preceded by a backslash, having escape characters
- removed, defines that command''. */
- if (backquote)
- {
- if (c == '`')
- backquote = 0;
- temp[j++] = c;
- i++;
- continue;
- }
-
- if (c == '`')
- {
- temp[j++] = c;
- backquote++;
- i++;
- continue;
- }
-
- /* Pass everything between `$(' and the matching `)' or a quoted
- ${ ... } pair through according to the Posix.2 specification. */
- if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE)))
- {
- int free_ret = 1;
-
- si = i + 2;
- if (string[i + 1] == LPAREN)
- ret = extract_command_subst (string, &si, 0);
- else
- ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, 0);
-
- temp[j++] = '$';
- temp[j++] = string[i + 1];
-
- /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error
- is set. */
- if (ret == 0 && no_longjmp_on_fatal_error)
- {
- free_ret = 0;
- ret = string + i + 2;
- }
-
- for (t = 0; ret[t]; t++, j++)
- temp[j] = ret[t];
- temp[j] = string[si];
-
- if (string[si])
- {
- j++;
- i = si + 1;
- }
- else
- i = si;
-
- if (free_ret)
- free (ret);
- continue;
- }
-
- /* Add any character but a double quote to the quoted string we're
- accumulating. */
- if (c != '"')
- goto add_one_character;
-
- /* c == '"' */
- if (stripdq)
- {
- dquote ^= 1;
- i++;
- continue;
- }
-
- break;
- }
- temp[j] = '\0';
-
- /* Point to after the closing quote. */
- if (c)
- i++;
- *sindex = i;
-
- return (temp);
-}
-
-/* This should really be another option to string_extract_double_quoted. */
-static int
-skip_double_quoted (string, slen, sind)
- char *string;
- size_t slen;
- int sind;
-{
- int c, i;
- char *ret;
- int pass_next, backquote, si;
- DECLARE_MBSTATE;
-
- pass_next = backquote = 0;
- i = sind;
- while (c = string[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next++;
- i++;
- continue;
- }
- else if (backquote)
- {
- if (c == '`')
- backquote = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '`')
- {
- backquote++;
- i++;
- continue;
- }
- else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE)))
- {
- si = i + 2;
- if (string[i + 1] == LPAREN)
- ret = extract_command_subst (string, &si, SX_NOALLOC);
- else
- ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, SX_NOALLOC);
-
- i = si + 1;
- continue;
- }
- else if (c != '"')
- {
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else
- break;
- }
-
- if (c)
- i++;
-
- return (i);
-}
-
-/* Extract the contents of STRING as if it is enclosed in single quotes.
- SINDEX, when passed in, is the offset of the character immediately
- following the opening single quote; on exit, SINDEX is left pointing after
- the closing single quote. */
-static inline char *
-string_extract_single_quoted (string, sindex)
- char *string;
- int *sindex;
-{
- register int i;
- size_t slen;
- char *t;
- DECLARE_MBSTATE;
-
- /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0;
- i = *sindex;
- while (string[i] && string[i] != '\'')
- ADVANCE_CHAR (string, slen, i);
-
- t = substring (string, *sindex, i);
-
- if (string[i])
- i++;
- *sindex = i;
-
- return (t);
-}
-
-static inline int
-skip_single_quoted (string, slen, sind)
- const char *string;
- size_t slen;
- int sind;
-{
- register int c;
- DECLARE_MBSTATE;
-
- c = sind;
- while (string[c] && string[c] != '\'')
- ADVANCE_CHAR (string, slen, c);
-
- if (string[c])
- c++;
- return c;
-}
-
-/* Just like string_extract, but doesn't hack backslashes or any of
- that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */
-static char *
-string_extract_verbatim (string, slen, sindex, charlist, flags)
- char *string;
- size_t slen;
- int *sindex;
- char *charlist;
- int flags;
-{
- register int i;
-#if defined (HANDLE_MULTIBYTE)
- size_t clen;
- wchar_t *wcharlist;
-#endif
- int c;
- char *temp;
- DECLARE_MBSTATE;
-
- if (charlist[0] == '\'' && charlist[1] == '\0')
- {
- temp = string_extract_single_quoted (string, sindex);
- --*sindex; /* leave *sindex at separator character */
- return temp;
- }
-
- i = *sindex;
-#if 0
- /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need
- this only if MB_CUR_MAX > 1. */
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1;
-#endif
-#if defined (HANDLE_MULTIBYTE)
- clen = strlen (charlist);
- wcharlist = 0;
-#endif
- while (c = string[i])
- {
-#if defined (HANDLE_MULTIBYTE)
- size_t mblength;
-#endif
- if ((flags & SX_NOCTLESC) == 0 && c == CTLESC)
- {
- i += 2;
- continue;
- }
- /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL
- through, to protect the CTLNULs from later calls to
- remove_quoted_nulls. */
- else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL)
- {
- i += 2;
- continue;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- mblength = MBLEN (string + i, slen - i);
- if (mblength > 1)
- {
- wchar_t wc;
- mblength = mbtowc (&wc, string + i, slen - i);
- if (MB_INVALIDCH (mblength))
- {
- if (MEMBER (c, charlist))
- break;
- }
- else
- {
- if (wcharlist == 0)
- {
- size_t len;
- len = mbstowcs (wcharlist, charlist, 0);
- if (len == -1)
- len = 0;
- wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1));
- mbstowcs (wcharlist, charlist, len + 1);
- }
-
- if (wcschr (wcharlist, wc))
- break;
- }
- }
- else
-#endif
- if (MEMBER (c, charlist))
- break;
-
- ADVANCE_CHAR (string, slen, i);
- }
-
-#if defined (HANDLE_MULTIBYTE)
- FREE (wcharlist);
-#endif
-
- temp = substring (string, *sindex, i);
- *sindex = i;
-
- return (temp);
-}
-
-/* Extract the $( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "$(".
- Make (SINDEX) get the position of the matching ")". )
- XFLAGS is additional flags to pass to other extraction functions. */
-char *
-extract_command_subst (string, sindex, xflags)
- char *string;
- int *sindex;
- int xflags;
-{
- if (string[*sindex] == LPAREN)
- return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/
- else
- {
- xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0);
- return (xparse_dolparen (string, string+*sindex, sindex, xflags));
- }
-}
-
-/* Extract the $[ construct in STRING, and return a new string. (])
- Start extracting at (SINDEX) as if we had just seen "$[".
- Make (SINDEX) get the position of the matching "]". */
-char *
-extract_arithmetic_subst (string, sindex)
- char *string;
- int *sindex;
-{
- return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/
-}
-
-#if defined (PROCESS_SUBSTITUTION)
-/* Extract the <( or >( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "<(".
- Make (SINDEX) get the position of the matching ")". */ /*))*/
-char *
-extract_process_subst (string, starter, sindex)
- char *string;
- char *starter;
- int *sindex;
-{
- return (extract_delimited_string (string, sindex, starter, "(", ")", SX_COMMAND));
-}
-#endif /* PROCESS_SUBSTITUTION */
-
-#if defined (ARRAY_VARS)
-/* This can be fooled by unquoted right parens in the passed string. If
- each caller verifies that the last character in STRING is a right paren,
- we don't even need to call extract_delimited_string. */
-char *
-extract_array_assignment_list (string, sindex)
- char *string;
- int *sindex;
-{
- int slen;
- char *ret;
-
- slen = strlen (string); /* ( */
- if (string[slen - 1] == ')')
- {
- ret = substring (string, *sindex, slen - 1);
- *sindex = slen - 1;
- return ret;
- }
- return 0;
-}
-#endif
-
-/* Extract and create a new string from the contents of STRING, a
- character string delimited with OPENER and CLOSER. SINDEX is
- the address of an int describing the current offset in STRING;
- it should point to just after the first OPENER found. On exit,
- SINDEX gets the position of the last character of the matching CLOSER.
- If OPENER is more than a single character, ALT_OPENER, if non-null,
- contains a character string that can also match CLOSER and thus
- needs to be skipped. */
-static char *
-extract_delimited_string (string, sindex, opener, alt_opener, closer, flags)
- char *string;
- int *sindex;
- char *opener, *alt_opener, *closer;
- int flags;
-{
- int i, c, si;
- size_t slen;
- char *t, *result;
- int pass_character, nesting_level, in_comment;
- int len_closer, len_opener, len_alt_opener;
- DECLARE_MBSTATE;
-
- slen = strlen (string + *sindex) + *sindex;
- len_opener = STRLEN (opener);
- len_alt_opener = STRLEN (alt_opener);
- len_closer = STRLEN (closer);
-
- pass_character = in_comment = 0;
-
- nesting_level = 1;
- i = *sindex;
-
- while (nesting_level)
- {
- c = string[i];
-
- if (c == 0)
- break;
-
- if (in_comment)
- {
- if (c == '\n')
- in_comment = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- if (pass_character) /* previous char was backslash */
- {
- pass_character = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- /* Not exactly right yet; should handle shell metacharacters and
- multibyte characters, too. See COMMENT_BEGIN define in parse.y */
- if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1])))
- {
- in_comment = 1;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- if (c == CTLESC || c == '\\')
- {
- pass_character++;
- i++;
- continue;
- }
-
- /* Process a nested command substitution, but only if we're parsing an
- arithmetic substitution. */
- if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN)
- {
- si = i + 2;
- t = extract_command_subst (string, &si, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Process a nested OPENER. */
- if (STREQN (string + i, opener, len_opener))
- {
- si = i + len_opener;
- t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Process a nested ALT_OPENER */
- if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener))
- {
- si = i + len_alt_opener;
- t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* If the current substring terminates the delimited string, decrement
- the nesting level. */
- if (STREQN (string + i, closer, len_closer))
- {
- i += len_closer - 1; /* move to last byte of the closer */
- nesting_level--;
- if (nesting_level == 0)
- break;
- }
-
- /* Pass old-style command substitution through verbatim. */
- if (c == '`')
- {
- si = i + 1;
- t = string_extract (string, &si, "`", flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass single-quoted and double-quoted strings through verbatim. */
- if (c == '\'' || c == '"')
- {
- si = i + 1;
- i = (c == '\'') ? skip_single_quoted (string, slen, si)
- : skip_double_quoted (string, slen, si);
- continue;
- }
-
- /* move past this character, which was not special. */
- ADVANCE_CHAR (string, slen, i);
- }
-
- if (c == 0 && nesting_level)
- {
- if (no_longjmp_on_fatal_error == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("bad substitution: no closing `%s' in %s"), closer, string);
- exp_jump_to_top_level (DISCARD);
- }
- else
- {
- *sindex = i;
- return (char *)NULL;
- }
- }
-
- si = i - *sindex - len_closer + 1;
- if (flags & SX_NOALLOC)
- result = (char *)NULL;
- else
- {
- result = (char *)xmalloc (1 + si);
- strncpy (result, string + *sindex, si);
- result[si] = '\0';
- }
- *sindex = i;
-
- return (result);
-}
-
-/* Extract a parameter expansion expression within ${ and } from STRING.
- Obey the Posix.2 rules for finding the ending `}': count braces while
- skipping over enclosed quoted strings and command substitutions.
- SINDEX is the address of an int describing the current offset in STRING;
- it should point to just after the first `{' found. On exit, SINDEX
- gets the position of the matching `}'. QUOTED is non-zero if this
- occurs inside double quotes. */
-/* XXX -- this is very similar to extract_delimited_string -- XXX */
-static char *
-extract_dollar_brace_string (string, sindex, quoted, flags)
- char *string;
- int *sindex, quoted, flags;
-{
- register int i, c;
- size_t slen;
- int pass_character, nesting_level, si, dolbrace_state;
- char *result, *t;
- DECLARE_MBSTATE;
-
- pass_character = 0;
- nesting_level = 1;
- slen = strlen (string + *sindex) + *sindex;
-
- /* The handling of dolbrace_state needs to agree with the code in parse.y:
- parse_matched_pair(). The different initial value is to handle the
- case where this function is called to parse the word in
- ${param op word} (SX_WORD). */
- dolbrace_state = (flags & SX_WORD) ? DOLBRACE_WORD : DOLBRACE_PARAM;
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && (flags & SX_POSIXEXP))
- dolbrace_state = DOLBRACE_QUOTE;
-
- i = *sindex;
- while (c = string[i])
- {
- if (pass_character)
- {
- pass_character = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- /* CTLESCs and backslashes quote the next character. */
- if (c == CTLESC || c == '\\')
- {
- pass_character++;
- i++;
- continue;
- }
-
- if (string[i] == '$' && string[i+1] == LBRACE)
- {
- nesting_level++;
- i += 2;
- continue;
- }
-
- if (c == RBRACE)
- {
- nesting_level--;
- if (nesting_level == 0)
- break;
- i++;
- continue;
- }
-
- /* Pass the contents of old-style command substitutions through
- verbatim. */
- if (c == '`')
- {
- si = i + 1;
- t = string_extract (string, &si, "`", flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass the contents of new-style command substitutions and
- arithmetic substitutions through verbatim. */
- if (string[i] == '$' && string[i+1] == LPAREN)
- {
- si = i + 2;
- t = extract_command_subst (string, &si, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass the contents of double-quoted strings through verbatim. */
- if (c == '"')
- {
- si = i + 1;
- i = skip_double_quoted (string, slen, si);
- /* skip_XXX_quoted leaves index one past close quote */
- continue;
- }
-
- if (c == '\'')
- {
-/*itrace("extract_dollar_brace_string: c == single quote flags = %d quoted = %d dolbrace_state = %d", flags, quoted, dolbrace_state);*/
- if (posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ADVANCE_CHAR (string, slen, i);
- else
- {
- si = i + 1;
- i = skip_single_quoted (string, slen, si);
- }
-
- continue;
- }
-
- /* move past this character, which was not special. */
- ADVANCE_CHAR (string, slen, i);
-
- /* This logic must agree with parse.y:parse_matched_pair, since they
- share the same defines. */
- if (dolbrace_state == DOLBRACE_PARAM && c == '%' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '#' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '/' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '^' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == ',' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", c) != 0)
- dolbrace_state = DOLBRACE_OP;
- else if (dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", c) == 0)
- dolbrace_state = DOLBRACE_WORD;
- }
-
- if (c == 0 && nesting_level)
- {
- if (no_longjmp_on_fatal_error == 0)
- { /* { */
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("bad substitution: no closing `%s' in %s"), "}", string);
- exp_jump_to_top_level (DISCARD);
- }
- else
- {
- *sindex = i;
- return ((char *)NULL);
- }
- }
-
- result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i);
- *sindex = i;
-
- return (result);
-}
-
-/* Remove backslashes which are quoting backquotes from STRING. Modifies
- STRING, and returns a pointer to it. */
-char *
-de_backslash (string)
- char *string;
-{
- register size_t slen;
- register int i, j, prev_i;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- i = j = 0;
-
- /* Loop copying string[i] to string[j], i >= j. */
- while (i < slen)
- {
- if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' ||
- string[i + 1] == '$'))
- i++;
- prev_i = i;
- ADVANCE_CHAR (string, slen, i);
- if (j < prev_i)
- do string[j++] = string[prev_i++]; while (prev_i < i);
- else
- j = i;
- }
- string[j] = '\0';
-
- return (string);
-}
-
-#if 0
-/*UNUSED*/
-/* Replace instances of \! in a string with !. */
-void
-unquote_bang (string)
- char *string;
-{
- register int i, j;
- register char *temp;
-
- temp = (char *)xmalloc (1 + strlen (string));
-
- for (i = 0, j = 0; (temp[j] = string[i]); i++, j++)
- {
- if (string[i] == '\\' && string[i + 1] == '!')
- {
- temp[j] = '!';
- i++;
- }
- }
- strcpy (string, temp);
- free (temp);
-}
-#endif
-
-#define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0)
-
-/* This function assumes s[i] == open; returns with s[ret] == close; used to
- parse array subscripts. FLAGS & 1 means to not attempt to skip over
- matched pairs of quotes or backquotes, or skip word expansions; it is
- intended to be used after expansion has been performed and during final
- assignment parsing (see arrayfunc.c:assign_compound_array_list()). */
-static int
-skip_matched_pair (string, start, open, close, flags)
- const char *string;
- int start, open, close, flags;
-{
- int i, pass_next, backq, si, c, count;
- size_t slen;
- char *temp, *ss;
- DECLARE_MBSTATE;
-
- slen = strlen (string + start) + start;
- no_longjmp_on_fatal_error = 1;
-
- i = start + 1; /* skip over leading bracket */
- count = 1;
- pass_next = backq = 0;
- ss = (char *)string;
- while (c = string[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- if (c == 0)
- CQ_RETURN(i);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (backq)
- {
- if (c == '`')
- backq = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if ((flags & 1) == 0 && c == '`')
- {
- backq = 1;
- i++;
- continue;
- }
- else if ((flags & 1) == 0 && c == open)
- {
- count++;
- i++;
- continue;
- }
- else if (c == close)
- {
- count--;
- if (count == 0)
- break;
- i++;
- continue;
- }
- else if ((flags & 1) == 0 && (c == '\'' || c == '"'))
- {
- i = (c == '\'') ? skip_single_quoted (ss, slen, ++i)
- : skip_double_quoted (ss, slen, ++i);
- /* no increment, the skip functions increment past the closing quote. */
- }
- else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- if (string[i+1] == LPAREN)
- temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
- else
- temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC);
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(i);
-}
-
-#if defined (ARRAY_VARS)
-int
-skipsubscript (string, start, flags)
- const char *string;
- int start, flags;
-{
- return (skip_matched_pair (string, start, '[', ']', flags));
-}
-#endif
-
-/* Skip characters in STRING until we find a character in DELIMS, and return
- the index of that character. START is the index into string at which we
- begin. This is similar in spirit to strpbrk, but it returns an index into
- STRING and takes a starting index. This little piece of code knows quite
- a lot of shell syntax. It's very similar to skip_double_quoted and other
- functions of that ilk. */
-int
-skip_to_delim (string, start, delims, flags)
- char *string;
- int start;
- char *delims;
- int flags;
-{
- int i, pass_next, backq, si, c, invert, skipquote, skipcmd;
- size_t slen;
- char *temp, open[3];
- DECLARE_MBSTATE;
-
- slen = strlen (string + start) + start;
- if (flags & SD_NOJMP)
- no_longjmp_on_fatal_error = 1;
- invert = (flags & SD_INVERT);
- skipcmd = (flags & SD_NOSKIPCMD) == 0;
-
- i = start;
- pass_next = backq = 0;
- while (c = string[i])
- {
- /* If this is non-zero, we should not let quote characters be delimiters
- and the current character is a single or double quote. We should not
- test whether or not it's a delimiter until after we skip single- or
- double-quoted strings. */
- skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"'));
- if (pass_next)
- {
- pass_next = 0;
- if (c == 0)
- CQ_RETURN(i);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (backq)
- {
- if (c == '`')
- backq = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '`')
- {
- backq = 1;
- i++;
- continue;
- }
- else if (skipquote == 0 && invert == 0 && member (c, delims))
- break;
- else if (c == '\'' || c == '"')
- {
- i = (c == '\'') ? skip_single_quoted (string, slen, ++i)
- : skip_double_quoted (string, slen, ++i);
- /* no increment, the skip functions increment past the closing quote. */
- }
- else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- if (string[i+1] == LPAREN)
- temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
- else
- temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC);
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
-#if defined (PROCESS_SUBSTITUTION)
- else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN)
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
- temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si);
- free (temp); /* no SX_ALLOC here */
- i = si;
- if (string[i] == '\0')
- break;
- i++;
- continue;
- }
-#endif /* PROCESS_SUBSTITUTION */
-#if defined (EXTENDED_GLOB)
- else if ((flags & SD_EXTGLOB) && extended_glob && string[i+1] == LPAREN && member (c, "?*+!@"))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- open[0] = c;
- open[1] = LPAREN;
- open[2] = '\0';
- temp = extract_delimited_string (string, &si, open, "(", ")", SX_NOALLOC); /* ) */
-
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
-#endif
- else if ((skipquote || invert) && (member (c, delims) == 0))
- break;
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(i);
-}
-
-#if defined (READLINE)
-/* Return 1 if the portion of STRING ending at EINDEX is quoted (there is
- an unclosed quoted string), or if the character at EINDEX is quoted
- by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various
- single and double-quoted string parsing functions should not return an
- error if there are unclosed quotes or braces. The characters that this
- recognizes need to be the same as the contents of
- rl_completer_quote_characters. */
-
-int
-char_is_quoted (string, eindex)
- char *string;
- int eindex;
-{
- int i, pass_next, c;
- size_t slen;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- no_longjmp_on_fatal_error = 1;
- i = pass_next = 0;
- while (i <= eindex)
- {
- c = string[i];
-
- if (pass_next)
- {
- pass_next = 0;
- if (i >= eindex) /* XXX was if (i >= eindex - 1) */
- CQ_RETURN(1);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (c == '\'' || c == '"')
- {
- i = (c == '\'') ? skip_single_quoted (string, slen, ++i)
- : skip_double_quoted (string, slen, ++i);
- if (i > eindex)
- CQ_RETURN(1);
- /* no increment, the skip_xxx functions go one past end */
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(0);
-}
-
-int
-unclosed_pair (string, eindex, openstr)
- char *string;
- int eindex;
- char *openstr;
-{
- int i, pass_next, openc, olen;
- size_t slen;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- olen = strlen (openstr);
- i = pass_next = openc = 0;
- while (i <= eindex)
- {
- if (pass_next)
- {
- pass_next = 0;
- if (i >= eindex) /* XXX was if (i >= eindex - 1) */
- return 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (string[i] == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (STREQN (string + i, openstr, olen))
- {
- openc = 1 - openc;
- i += olen;
- }
- else if (string[i] == '\'' || string[i] == '"')
- {
- i = (string[i] == '\'') ? skip_single_quoted (string, slen, i)
- : skip_double_quoted (string, slen, i);
- if (i > eindex)
- return 0;
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
- return (openc);
-}
-
-/* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the
- individual words. If DELIMS is NULL, the current value of $IFS is used
- to split the string, and the function follows the shell field splitting
- rules. SENTINEL is an index to look for. NWP, if non-NULL,
- gets the number of words in the returned list. CWP, if non-NULL, gets
- the index of the word containing SENTINEL. Non-whitespace chars in
- DELIMS delimit separate fields. */
-WORD_LIST *
-split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp)
- char *string;
- int slen;
- char *delims;
- int sentinel, flags;
- int *nwp, *cwp;
-{
- int ts, te, i, nw, cw, ifs_split, dflags;
- char *token, *d, *d2;
- WORD_LIST *ret, *tl;
-
- if (string == 0 || *string == '\0')
- {
- if (nwp)
- *nwp = 0;
- if (cwp)
- *cwp = 0;
- return ((WORD_LIST *)NULL);
- }
-
- d = (delims == 0) ? ifs_value : delims;
- ifs_split = delims == 0;
-
- /* Make d2 the non-whitespace characters in delims */
- d2 = 0;
- if (delims)
- {
- size_t slength;
-#if defined (HANDLE_MULTIBYTE)
- size_t mblength = 1;
-#endif
- DECLARE_MBSTATE;
-
- slength = strlen (delims);
- d2 = (char *)xmalloc (slength + 1);
- i = ts = 0;
- while (delims[i])
- {
-#if defined (HANDLE_MULTIBYTE)
- mbstate_t state_bak;
- state_bak = state;
- mblength = MBRLEN (delims + i, slength, &state);
- if (MB_INVALIDCH (mblength))
- state = state_bak;
- else if (mblength > 1)
- {
- memcpy (d2 + ts, delims + i, mblength);
- ts += mblength;
- i += mblength;
- slength -= mblength;
- continue;
- }
-#endif
- if (whitespace (delims[i]) == 0)
- d2[ts++] = delims[i];
-
- i++;
- slength--;
- }
- d2[ts] = '\0';
- }
-
- ret = (WORD_LIST *)NULL;
-
- /* Remove sequences of whitespace characters at the start of the string, as
- long as those characters are delimiters. */
- for (i = 0; member (string[i], d) && spctabnl (string[i]); i++)
- ;
- if (string[i] == '\0')
- return (ret);
-
- ts = i;
- nw = 0;
- cw = -1;
- dflags = flags|SD_NOJMP;
- while (1)
- {
- te = skip_to_delim (string, ts, d, dflags);
-
- /* If we have a non-whitespace delimiter character, use it to make a
- separate field. This is just about what $IFS splitting does and
- is closer to the behavior of the shell parser. */
- if (ts == te && d2 && member (string[ts], d2))
- {
- te = ts + 1;
- /* If we're using IFS splitting, the non-whitespace delimiter char
- and any additional IFS whitespace delimits a field. */
- if (ifs_split)
- while (member (string[te], d) && spctabnl (string[te]))
- te++;
- else
- while (member (string[te], d2))
- te++;
- }
-
- token = substring (string, ts, te);
-
- ret = add_string_to_list (token, ret);
- free (token);
- nw++;
-
- if (sentinel >= ts && sentinel <= te)
- cw = nw;
-
- /* If the cursor is at whitespace just before word start, set the
- sentinel word to the current word. */
- if (cwp && cw == -1 && sentinel == ts-1)
- cw = nw;
-
- /* If the cursor is at whitespace between two words, make a new, empty
- word, add it before (well, after, since the list is in reverse order)
- the word we just added, and set the current word to that one. */
- if (cwp && cw == -1 && sentinel < ts)
- {
- tl = make_word_list (make_word (""), ret->next);
- ret->next = tl;
- cw = nw;
- nw++;
- }
-
- if (string[te] == 0)
- break;
-
- i = te;
- while (member (string[i], d) && (ifs_split || spctabnl(string[i])))
- i++;
-
- if (string[i])
- ts = i;
- else
- break;
- }
-
- /* Special case for SENTINEL at the end of STRING. If we haven't found
- the word containing SENTINEL yet, and the index we're looking for is at
- the end of STRING (or past the end of the previously-found token,
- possible if the end of the line is composed solely of IFS whitespace)
- add an additional null argument and set the current word pointer to that. */
- if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te))
- {
- if (whitespace (string[sentinel - 1]))
- {
- token = "";
- ret = add_string_to_list (token, ret);
- nw++;
- }
- cw = nw;
- }
-
- if (nwp)
- *nwp = nw;
- if (cwp)
- *cwp = cw;
-
- FREE (d2);
-
- return (REVERSE_LIST (ret, WORD_LIST *));
-}
-#endif /* READLINE */
-
-#if 0
-/* UNUSED */
-/* Extract the name of the variable to bind to from the assignment string. */
-char *
-assignment_name (string)
- char *string;
-{
- int offset;
- char *temp;
-
- offset = assignment (string, 0);
- if (offset == 0)
- return (char *)NULL;
- temp = substring (string, 0, offset);
- return (temp);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Functions to convert strings to WORD_LISTs and vice versa */
-/* */
-/* **************************************************************** */
-
-/* Return a single string of all the words in LIST. SEP is the separator
- to put between individual elements of LIST in the output string. */
-char *
-string_list_internal (list, sep)
- WORD_LIST *list;
- char *sep;
-{
- register WORD_LIST *t;
- char *result, *r;
- int word_len, sep_len, result_size;
-
- if (list == 0)
- return ((char *)NULL);
-
- /* Short-circuit quickly if we don't need to separate anything. */
- if (list->next == 0)
- return (savestring (list->word->word));
-
- /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */
- sep_len = STRLEN (sep);
- result_size = 0;
-
- for (t = list; t; t = t->next)
- {
- if (t != list)
- result_size += sep_len;
- result_size += strlen (t->word->word);
- }
-
- r = result = (char *)xmalloc (result_size + 1);
-
- for (t = list; t; t = t->next)
- {
- if (t != list && sep_len)
- {
- if (sep_len > 1)
- {
- FASTCOPY (sep, r, sep_len);
- r += sep_len;
- }
- else
- *r++ = sep[0];
- }
-
- word_len = strlen (t->word->word);
- FASTCOPY (t->word->word, r, word_len);
- r += word_len;
- }
-
- *r = '\0';
- return (result);
-}
-
-/* Return a single string of all the words present in LIST, separating
- each word with a space. */
-char *
-string_list (list)
- WORD_LIST *list;
-{
- return (string_list_internal (list, " "));
-}
-
-/* An external interface that can be used by the rest of the shell to
- obtain a string containing the first character in $IFS. Handles all
- the multibyte complications. If LENP is non-null, it is set to the
- length of the returned string. */
-char *
-ifs_firstchar (lenp)
- int *lenp;
-{
- char *ret;
- int len;
-
- ret = xmalloc (MB_LEN_MAX + 1);
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc_len == 1)
- {
- ret[0] = ifs_firstc[0];
- ret[1] = '\0';
- len = ret[0] ? 1 : 0;
- }
- else
- {
- memcpy (ret, ifs_firstc, ifs_firstc_len);
- ret[len = ifs_firstc_len] = '\0';
- }
-#else
- ret[0] = ifs_firstc;
- ret[1] = '\0';
- len = ret[0] ? 0 : 1;
-#endif
-
- if (lenp)
- *lenp = len;
-
- return ret;
-}
-
-/* Return a single string of all the words present in LIST, obeying the
- quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the
- expansion [of $*] appears within a double quoted string, it expands
- to a single field with the value of each parameter separated by the
- first character of the IFS variable, or by a <space> if IFS is unset." */
-char *
-string_list_dollar_star (list)
- WORD_LIST *list;
-{
- char *ret;
-#if defined (HANDLE_MULTIBYTE)
-# if defined (__GNUC__)
- char sep[MB_CUR_MAX + 1];
-# else
- char *sep = 0;
-# endif
-#else
- char sep[2];
-#endif
-
-#if defined (HANDLE_MULTIBYTE)
-# if !defined (__GNUC__)
- sep = (char *)xmalloc (MB_CUR_MAX + 1);
-# endif /* !__GNUC__ */
- if (ifs_firstc_len == 1)
- {
- sep[0] = ifs_firstc[0];
- sep[1] = '\0';
- }
- else
- {
- memcpy (sep, ifs_firstc, ifs_firstc_len);
- sep[ifs_firstc_len] = '\0';
- }
-#else
- sep[0] = ifs_firstc;
- sep[1] = '\0';
-#endif
-
- ret = string_list_internal (list, sep);
-#if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__)
- free (sep);
-#endif
- return ret;
-}
-
-/* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- is non-zero, the $@ appears within double quotes, and we should quote
- the list before converting it into a string. If IFS is unset, and the
- word is not quoted, we just need to quote CTLESC and CTLNUL characters
- in the words in the list, because the default value of $IFS is
- <space><tab><newline>, IFS characters in the words in the list should
- also be split. If IFS is null, and the word is not quoted, we need
- to quote the words in the list to preserve the positional parameters
- exactly. */
-char *
-string_list_dollar_at (list, quoted)
- WORD_LIST *list;
- int quoted;
-{
- char *ifs, *ret;
-#if defined (HANDLE_MULTIBYTE)
-# if defined (__GNUC__)
- char sep[MB_CUR_MAX + 1];
-# else
- char *sep = 0;
-# endif /* !__GNUC__ */
-#else
- char sep[2];
-#endif
- WORD_LIST *tlist;
-
- /* XXX this could just be ifs = ifs_value; */
- ifs = ifs_var ? value_cell (ifs_var) : (char *)0;
-
-#if defined (HANDLE_MULTIBYTE)
-# if !defined (__GNUC__)
- sep = (char *)xmalloc (MB_CUR_MAX + 1);
-# endif /* !__GNUC__ */
- if (ifs && *ifs)
- {
- if (ifs_firstc_len == 1)
- {
- sep[0] = ifs_firstc[0];
- sep[1] = '\0';
- }
- else
- {
- memcpy (sep, ifs_firstc, ifs_firstc_len);
- sep[ifs_firstc_len] = '\0';
- }
- }
- else
- {
- sep[0] = ' ';
- sep[1] = '\0';
- }
-#else
- sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs;
- sep[1] = '\0';
-#endif
-
- /* XXX -- why call quote_list if ifs == 0? we can get away without doing
- it now that quote_escapes quotes spaces */
- tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE))
- ? quote_list (list)
- : list_quote_escapes (list);
-
- ret = string_list_internal (tlist, sep);
-#if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__)
- free (sep);
-#endif
- return ret;
-}
-
-/* Turn the positional paramters into a string, understanding quoting and
- the various subtleties of using the first character of $IFS as the
- separator. Calls string_list_dollar_at, string_list_dollar_star, and
- string_list as appropriate. */
-char *
-string_list_pos_params (pchar, list, quoted)
- int pchar;
- WORD_LIST *list;
- int quoted;
-{
- char *ret;
- WORD_LIST *tlist;
-
- if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES))
- {
- tlist = quote_list (list);
- word_list_remove_quoted_nulls (tlist);
- ret = string_list_dollar_star (tlist);
- }
- else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT))
- {
- tlist = quote_list (list);
- word_list_remove_quoted_nulls (tlist);
- ret = string_list (tlist);
- }
- else if (pchar == '*')
- {
- /* Even when unquoted, string_list_dollar_star does the right thing
- making sure that the first character of $IFS is used as the
- separator. */
- ret = string_list_dollar_star (list);
- }
- else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- /* We use string_list_dollar_at, but only if the string is quoted, since
- that quotes the escapes if it's not, which we don't want. We could
- use string_list (the old code did), but that doesn't do the right
- thing if the first character of $IFS is not a space. We use
- string_list_dollar_star if the string is unquoted so we make sure that
- the elements of $@ are separated by the first character of $IFS for
- later splitting. */
- ret = string_list_dollar_at (list, quoted);
- else if (pchar == '@')
- ret = string_list_dollar_star (list);
- else
- ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list);
-
- return ret;
-}
-
-/* Return the list of words present in STRING. Separate the string into
- words at any of the characters found in SEPARATORS. If QUOTED is
- non-zero then word in the list will have its quoted flag set, otherwise
- the quoted flag is left as make_word () deemed fit.
-
- This obeys the P1003.2 word splitting semantics. If `separators' is
- exactly <space><tab><newline>, then the splitting algorithm is that of
- the Bourne shell, which treats any sequence of characters from `separators'
- as a delimiter. If IFS is unset, which results in `separators' being set
- to "", no splitting occurs. If separators has some other value, the
- following rules are applied (`IFS white space' means zero or more
- occurrences of <space>, <tab>, or <newline>, as long as those characters
- are in `separators'):
-
- 1) IFS white space is ignored at the start and the end of the
- string.
- 2) Each occurrence of a character in `separators' that is not
- IFS white space, along with any adjacent occurrences of
- IFS white space delimits a field.
- 3) Any nonzero-length sequence of IFS white space delimits a field.
- */
-
-/* BEWARE! list_string strips null arguments. Don't call it twice and
- expect to have "" preserved! */
-
-/* This performs word splitting and quoted null character removal on
- STRING. */
-#define issep(c) \
- (((separators)[0]) ? ((separators)[1] ? isifs(c) \
- : (c) == (separators)[0]) \
- : 0)
-
-WORD_LIST *
-list_string (string, separators, quoted)
- register char *string, *separators;
- int quoted;
-{
- WORD_LIST *result;
- WORD_DESC *t;
- char *current_word, *s;
- int sindex, sh_style_split, whitesep, xflags;
- size_t slen;
-
- if (!string || !*string)
- return ((WORD_LIST *)NULL);
-
- sh_style_split = separators && separators[0] == ' ' &&
- separators[1] == '\t' &&
- separators[2] == '\n' &&
- separators[3] == '\0';
- for (xflags = 0, s = ifs_value; s && *s; s++)
- {
- if (*s == CTLESC) xflags |= SX_NOCTLESC;
- else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL;
- }
-
- slen = 0;
- /* Remove sequences of whitespace at the beginning of STRING, as
- long as those characters appear in IFS. Do not do this if
- STRING is quoted or if there are no separator characters. */
- if (!quoted || !separators || !*separators)
- {
- for (s = string; *s && spctabnl (*s) && issep (*s); s++);
-
- if (!*s)
- return ((WORD_LIST *)NULL);
-
- string = s;
- }
-
- /* OK, now STRING points to a word that does not begin with white space.
- The splitting algorithm is:
- extract a word, stopping at a separator
- skip sequences of spc, tab, or nl as long as they are separators
- This obeys the field splitting rules in Posix.2. */
- slen = (MB_CUR_MAX > 1) ? strlen (string) : 1;
- for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; )
- {
- /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim
- unless multibyte chars are possible. */
- current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags);
- if (current_word == 0)
- break;
-
- /* If we have a quoted empty string, add a quoted null argument. We
- want to preserve the quoted null character iff this is a quoted
- empty string; otherwise the quoted null characters are removed
- below. */
- if (QUOTED_NULL (current_word))
- {
- t = alloc_word_desc ();
- t->word = make_quoted_char ('\0');
- t->flags |= W_QUOTED|W_HASQUOTEDNULL;
- result = make_word_list (t, result);
- }
- else if (current_word[0] != '\0')
- {
- /* If we have something, then add it regardless. However,
- perform quoted null character removal on the current word. */
- remove_quoted_nulls (current_word);
- result = add_string_to_list (current_word, result);
- result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- result->word->flags |= W_QUOTED;
- }
-
- /* If we're not doing sequences of separators in the traditional
- Bourne shell style, then add a quoted null argument. */
- else if (!sh_style_split && !spctabnl (string[sindex]))
- {
- t = alloc_word_desc ();
- t->word = make_quoted_char ('\0');
- t->flags |= W_QUOTED|W_HASQUOTEDNULL;
- result = make_word_list (t, result);
- }
-
- free (current_word);
-
- /* Note whether or not the separator is IFS whitespace, used later. */
- whitesep = string[sindex] && spctabnl (string[sindex]);
-
- /* Move past the current separator character. */
- if (string[sindex])
- {
- DECLARE_MBSTATE;
- ADVANCE_CHAR (string, slen, sindex);
- }
-
- /* Now skip sequences of space, tab, or newline characters if they are
- in the list of separators. */
- while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex]))
- sindex++;
-
- /* If the first separator was IFS whitespace and the current character
- is a non-whitespace IFS character, it should be part of the current
- field delimiter, not a separate delimiter that would result in an
- empty field. Look at POSIX.2, 3.6.5, (3)(b). */
- if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex]))
- {
- sindex++;
- /* An IFS character that is not IFS white space, along with any
- adjacent IFS white space, shall delimit a field. (SUSv3) */
- while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex]))
- sindex++;
- }
- }
- return (REVERSE_LIST (result, WORD_LIST *));
-}
-
-/* Parse a single word from STRING, using SEPARATORS to separate fields.
- ENDPTR is set to the first character after the word. This is used by
- the `read' builtin. This is never called with SEPARATORS != $IFS;
- it should be simplified.
-
- XXX - this function is very similar to list_string; they should be
- combined - XXX */
-char *
-get_word_from_string (stringp, separators, endptr)
- char **stringp, *separators, **endptr;
-{
- register char *s;
- char *current_word;
- int sindex, sh_style_split, whitesep, xflags;
- size_t slen;
-
- if (!stringp || !*stringp || !**stringp)
- return ((char *)NULL);
-
- sh_style_split = separators && separators[0] == ' ' &&
- separators[1] == '\t' &&
- separators[2] == '\n' &&
- separators[3] == '\0';
- for (xflags = 0, s = ifs_value; s && *s; s++)
- {
- if (*s == CTLESC) xflags |= SX_NOCTLESC;
- if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL;
- }
-
- s = *stringp;
- slen = 0;
-
- /* Remove sequences of whitespace at the beginning of STRING, as
- long as those characters appear in IFS. */
- if (sh_style_split || !separators || !*separators)
- {
- for (; *s && spctabnl (*s) && isifs (*s); s++);
-
- /* If the string is nothing but whitespace, update it and return. */
- if (!*s)
- {
- *stringp = s;
- if (endptr)
- *endptr = s;
- return ((char *)NULL);
- }
- }
-
- /* OK, S points to a word that does not begin with white space.
- Now extract a word, stopping at a separator, save a pointer to
- the first character after the word, then skip sequences of spc,
- tab, or nl as long as they are separators.
-
- This obeys the field splitting rules in Posix.2. */
- sindex = 0;
- /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim
- unless multibyte chars are possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (s) : 1;
- current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags);
-
- /* Set ENDPTR to the first character after the end of the word. */
- if (endptr)
- *endptr = s + sindex;
-
- /* Note whether or not the separator is IFS whitespace, used later. */
- whitesep = s[sindex] && spctabnl (s[sindex]);
-
- /* Move past the current separator character. */
- if (s[sindex])
- {
- DECLARE_MBSTATE;
- ADVANCE_CHAR (s, slen, sindex);
- }
-
- /* Now skip sequences of space, tab, or newline characters if they are
- in the list of separators. */
- while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex]))
- sindex++;
-
- /* If the first separator was IFS whitespace and the current character is
- a non-whitespace IFS character, it should be part of the current field
- delimiter, not a separate delimiter that would result in an empty field.
- Look at POSIX.2, 3.6.5, (3)(b). */
- if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex]))
- {
- sindex++;
- /* An IFS character that is not IFS white space, along with any adjacent
- IFS white space, shall delimit a field. */
- while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex]))
- sindex++;
- }
-
- /* Update STRING to point to the next field. */
- *stringp = s + sindex;
- return (current_word);
-}
-
-/* Remove IFS white space at the end of STRING. Start at the end
- of the string and walk backwards until the beginning of the string
- or we find a character that's not IFS white space and not CTLESC.
- Only let CTLESC escape a white space character if SAW_ESCAPE is
- non-zero. */
-char *
-strip_trailing_ifs_whitespace (string, separators, saw_escape)
- char *string, *separators;
- int saw_escape;
-{
- char *s;
-
- s = string + STRLEN (string) - 1;
- while (s > string && ((spctabnl (*s) && isifs (*s)) ||
- (saw_escape && *s == CTLESC && spctabnl (s[1]))))
- s--;
- *++s = '\0';
- return string;
-}
-
-#if 0
-/* UNUSED */
-/* Split STRING into words at whitespace. Obeys shell-style quoting with
- backslashes, single and double quotes. */
-WORD_LIST *
-list_string_with_quotes (string)
- char *string;
-{
- WORD_LIST *list;
- char *token, *s;
- size_t s_len;
- int c, i, tokstart, len;
-
- for (s = string; s && *s && spctabnl (*s); s++)
- ;
- if (s == 0 || *s == 0)
- return ((WORD_LIST *)NULL);
-
- s_len = strlen (s);
- tokstart = i = 0;
- list = (WORD_LIST *)NULL;
- while (1)
- {
- c = s[i];
- if (c == '\\')
- {
- i++;
- if (s[i])
- i++;
- }
- else if (c == '\'')
- i = skip_single_quoted (s, s_len, ++i);
- else if (c == '"')
- i = skip_double_quoted (s, s_len, ++i);
- else if (c == 0 || spctabnl (c))
- {
- /* We have found the end of a token. Make a word out of it and
- add it to the word list. */
- token = substring (s, tokstart, i);
- list = add_string_to_list (token, list);
- free (token);
- while (spctabnl (s[i]))
- i++;
- if (s[i])
- tokstart = i;
- else
- break;
- }
- else
- i++; /* normal character */
- }
- return (REVERSE_LIST (list, WORD_LIST *));
-}
-#endif
-
-/********************************************************/
-/* */
-/* Functions to perform assignment statements */
-/* */
-/********************************************************/
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *
-do_compound_assignment (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *v;
- int mklocal, mkassoc, mkglobal;
- WORD_LIST *list;
-
- mklocal = flags & ASS_MKLOCAL;
- mkassoc = flags & ASS_MKASSOC;
- mkglobal = flags & ASS_MKGLOBAL;
-
- if (mklocal && variable_context)
- {
- v = find_variable (name);
- list = expand_compound_array_assignment (v, value, flags);
- if (mkassoc)
- v = make_local_assoc_variable (name);
- else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context)
- v = make_local_array_variable (name, 0);
- if (v)
- assign_compound_array_list (v, list, flags);
- }
- /* In a function but forcing assignment in global context */
- else if (mkglobal && variable_context)
- {
- v = find_global_variable (name);
- list = expand_compound_array_assignment (v, value, flags);
- if (v == 0 && mkassoc)
- v = make_new_assoc_variable (name);
- else if (v && mkassoc && assoc_p (v) == 0)
- v = convert_var_to_assoc (v);
- else if (v == 0)
- v = make_new_array_variable (name);
- else if (v && mkassoc == 0 && array_p (v) == 0)
- v = convert_var_to_array (v);
- if (v)
- assign_compound_array_list (v, list, flags);
- }
- else
- v = assign_array_from_string (name, value, flags);
-
- return (v);
-}
-#endif
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. If EXPAND is true, then
- perform parameter expansion, command substitution, and arithmetic
- expansion on the right-hand side. Perform tilde expansion in any
- case. Do not perform word splitting on the result of expansion. */
-static int
-do_assignment_internal (word, expand)
- const WORD_DESC *word;
- int expand;
-{
- int offset, appendop, assign_list, aflags, retval;
- char *name, *value, *temp;
- SHELL_VAR *entry;
-#if defined (ARRAY_VARS)
- char *t;
- int ni;
-#endif
- const char *string;
-
- if (word == 0 || word->word == 0)
- return 0;
-
- appendop = assign_list = aflags = 0;
- string = word->word;
- offset = assignment (string, 0);
- name = savestring (string);
- value = (char *)NULL;
-
- if (name[offset] == '=')
- {
- if (name[offset - 1] == '+')
- {
- appendop = 1;
- name[offset - 1] = '\0';
- }
-
- name[offset] = 0; /* might need this set later */
- temp = name + offset + 1;
-
-#if defined (ARRAY_VARS)
- if (expand && (word->flags & W_COMPASSIGN))
- {
- assign_list = ni = 1;
- value = extract_array_assignment_list (temp, &ni);
- }
- else
-#endif
- if (expand && temp[0])
- value = expand_string_if_necessary (temp, 0, expand_string_assignment);
- else
- value = savestring (temp);
- }
-
- if (value == 0)
- {
- value = (char *)xmalloc (1);
- value[0] = '\0';
- }
-
- if (echo_command_at_execute)
- {
- if (appendop)
- name[offset - 1] = '+';
- xtrace_print_assignment (name, value, assign_list, 1);
- if (appendop)
- name[offset - 1] = '\0';
- }
-
-#define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0)
-
- if (appendop)
- aflags |= ASS_APPEND;
-
-#if defined (ARRAY_VARS)
- if (t = mbschr (name, '[')) /*]*/
- {
- if (assign_list)
- {
- report_error (_("%s: cannot assign list to array member"), name);
- ASSIGN_RETURN (0);
- }
- entry = assign_array_element (name, value, aflags);
- if (entry == 0)
- ASSIGN_RETURN (0);
- }
- else if (assign_list)
- {
- if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL) == 0)
- aflags |= ASS_MKLOCAL;
- if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL))
- aflags |= ASS_MKGLOBAL;
- if (word->flags & W_ASSIGNASSOC)
- aflags |= ASS_MKASSOC;
- entry = do_compound_assignment (name, value, aflags);
- }
- else
-#endif /* ARRAY_VARS */
- entry = bind_variable (name, value, aflags);
-
- stupidly_hack_special_variables (name);
-
- /* Return 1 if the assignment seems to have been performed correctly. */
- if (entry == 0 || readonly_p (entry))
- retval = 0; /* assignment failure */
- else if (noassign_p (entry))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- retval = 1; /* error status, but not assignment failure */
- }
- else
- retval = 1;
-
- if (entry && retval != 0 && noassign_p (entry) == 0)
- VUNSETATTR (entry, att_invisible);
-
- ASSIGN_RETURN (retval);
-}
-
-/* Perform the assignment statement in STRING, and expand the
- right side by doing tilde, command and parameter expansion. */
-int
-do_assignment (string)
- char *string;
-{
- WORD_DESC td;
-
- td.flags = W_ASSIGNMENT;
- td.word = string;
-
- return do_assignment_internal (&td, 1);
-}
-
-int
-do_word_assignment (word, flags)
- WORD_DESC *word;
- int flags;
-{
- return do_assignment_internal (word, 1);
-}
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. Do not perform any word
- expansions on the right hand side. */
-int
-do_assignment_no_expand (string)
- char *string;
-{
- WORD_DESC td;
-
- td.flags = W_ASSIGNMENT;
- td.word = string;
-
- return (do_assignment_internal (&td, 0));
-}
-
-/***************************************************
- * *
- * Functions to manage the positional parameters *
- * *
- ***************************************************/
-
-/* Return the word list that corresponds to `$*'. */
-WORD_LIST *
-list_rest_of_args ()
-{
- register WORD_LIST *list, *args;
- int i;
-
- /* Break out of the loop as soon as one of the dollar variables is null. */
- for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++)
- list = make_word_list (make_bare_word (dollar_vars[i]), list);
-
- for (args = rest_of_args; args; args = args->next)
- list = make_word_list (make_bare_word (args->word->word), list);
-
- return (REVERSE_LIST (list, WORD_LIST *));
-}
-
-int
-number_of_args ()
-{
- register WORD_LIST *list;
- int n;
-
- for (n = 0; n < 9 && dollar_vars[n+1]; n++)
- ;
- for (list = rest_of_args; list; list = list->next)
- n++;
- return n;
-}
-
-/* Return the value of a positional parameter. This handles values > 10. */
-char *
-get_dollar_var_value (ind)
- intmax_t ind;
-{
- char *temp;
- WORD_LIST *p;
-
- if (ind < 10)
- temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL;
- else /* We want something like ${11} */
- {
- ind -= 10;
- for (p = rest_of_args; p && ind--; p = p->next)
- ;
- temp = p ? savestring (p->word->word) : (char *)NULL;
- }
- return (temp);
-}
-
-/* Make a single large string out of the dollar digit variables,
- and the rest_of_args. If DOLLAR_STAR is 1, then obey the special
- case of "$*" with respect to IFS. */
-char *
-string_rest_of_args (dollar_star)
- int dollar_star;
-{
- register WORD_LIST *list;
- char *string;
-
- list = list_rest_of_args ();
- string = dollar_star ? string_list_dollar_star (list) : string_list (list);
- dispose_words (list);
- return (string);
-}
-
-/* Return a string containing the positional parameters from START to
- END, inclusive. If STRING[0] == '*', we obey the rules for $*,
- which only makes a difference if QUOTED is non-zero. If QUOTED includes
- Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise
- no quoting chars are added. */
-static char *
-pos_params (string, start, end, quoted)
- char *string;
- int start, end, quoted;
-{
- WORD_LIST *save, *params, *h, *t;
- char *ret;
- int i;
-
- /* see if we can short-circuit. if start == end, we want 0 parameters. */
- if (start == end)
- return ((char *)NULL);
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- if (start == 0) /* handle ${@:0[:x]} specially */
- {
- t = make_word_list (make_word (dollar_vars[0]), params);
- save = params = t;
- }
-
- for (i = start ? 1 : 0; params && i < start; i++)
- params = params->next;
- if (params == 0)
- return ((char *)NULL);
- for (h = t = params; params && i < end; i++)
- {
- t = params;
- params = params->next;
- }
-
- t->next = (WORD_LIST *)NULL;
-
- ret = string_list_pos_params (string[0], h, quoted);
-
- if (t != params)
- t->next = params;
-
- dispose_words (save);
- return (ret);
-}
-
-/******************************************************************/
-/* */
-/* Functions to expand strings to strings or WORD_LISTs */
-/* */
-/******************************************************************/
-
-#if defined (PROCESS_SUBSTITUTION)
-#define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~')
-#else
-#define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~')
-#endif
-
-/* If there are any characters in STRING that require full expansion,
- then call FUNC to expand STRING; otherwise just perform quote
- removal if necessary. This returns a new string. */
-static char *
-expand_string_if_necessary (string, quoted, func)
- char *string;
- int quoted;
- EXPFUNC *func;
-{
- WORD_LIST *list;
- size_t slen;
- int i, saw_quote;
- char *ret;
- DECLARE_MBSTATE;
-
- /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (string) : 0;
- i = saw_quote = 0;
- while (string[i])
- {
- if (EXP_CHAR (string[i]))
- break;
- else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"')
- saw_quote = 1;
- ADVANCE_CHAR (string, slen, i);
- }
-
- if (string[i])
- {
- list = (*func) (string, quoted);
- if (list)
- {
- ret = string_list (list);
- dispose_words (list);
- }
- else
- ret = (char *)NULL;
- }
- else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- ret = string_quote_removal (string, quoted);
- else
- ret = savestring (string);
-
- return ret;
-}
-
-static inline char *
-expand_string_to_string_internal (string, quoted, func)
- char *string;
- int quoted;
- EXPFUNC *func;
-{
- WORD_LIST *list;
- char *ret;
-
- if (string == 0 || *string == '\0')
- return ((char *)NULL);
-
- list = (*func) (string, quoted);
- if (list)
- {
- ret = string_list (list);
- dispose_words (list);
- }
- else
- ret = (char *)NULL;
-
- return (ret);
-}
-
-char *
-expand_string_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string));
-}
-
-char *
-expand_string_unsplit_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string_unsplit));
-}
-
-char *
-expand_assignment_string_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string_assignment));
-}
-
-char *
-expand_arith_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_if_necessary (string, quoted, expand_string));
-}
-
-#if defined (COND_COMMAND)
-/* Just remove backslashes in STRING. Returns a new string. */
-char *
-remove_backslashes (string)
- char *string;
-{
- char *r, *ret, *s;
-
- r = ret = (char *)xmalloc (strlen (string) + 1);
- for (s = string; s && *s; )
- {
- if (*s == '\\')
- s++;
- if (*s == 0)
- break;
- *r++ = *s++;
- }
- *r = '\0';
- return ret;
-}
-
-/* This needs better error handling. */
-/* Expand W for use as an argument to a unary or binary operator in a
- [[...]] expression. If SPECIAL is 1, this is the rhs argument
- to the != or == operator, and should be treated as a pattern. In
- this case, we quote the string specially for the globbing code. If
- SPECIAL is 2, this is an rhs argument for the =~ operator, and should
- be quoted appropriately for regcomp/regexec. The caller is responsible
- for removing the backslashes if the unquoted word is needed later. */
-char *
-cond_expand_word (w, special)
- WORD_DESC *w;
- int special;
-{
- char *r, *p;
- WORD_LIST *l;
- int qflags;
-
- if (w->word == 0 || w->word[0] == '\0')
- return ((char *)NULL);
-
- w->flags |= W_NOSPLIT2;
- l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0);
- if (l)
- {
- if (special == 0)
- {
- dequote_list (l);
- r = string_list (l);
- }
- else
- {
- qflags = QGLOB_CVTNULL;
- if (special == 2)
- qflags |= QGLOB_REGEXP;
- p = string_list (l);
- r = quote_string_for_globbing (p, qflags);
- free (p);
- }
- dispose_words (l);
- }
- else
- r = (char *)NULL;
-
- return r;
-}
-#endif
-
-/* Call expand_word_internal to expand W and handle error returns.
- A convenience function for functions that don't want to handle
- any errors or free any memory before aborting. */
-static WORD_LIST *
-call_expand_word_internal (w, q, i, c, e)
- WORD_DESC *w;
- int q, i, *c, *e;
-{
- WORD_LIST *result;
-
- result = expand_word_internal (w, q, i, c, e);
- if (result == &expand_word_error || result == &expand_word_fatal)
- {
- /* By convention, each time this error is returned, w->word has
- already been freed (it sometimes may not be in the fatal case,
- but that doesn't result in a memory leak because we're going
- to exit in most cases). */
- w->word = (char *)NULL;
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF);
- /* NOTREACHED */
- }
- else
- return (result);
-}
-
-/* Perform parameter expansion, command substitution, and arithmetic
- expansion on STRING, as if it were a word. Leave the result quoted.
- Since this does not perform word splitting, it leaves quoted nulls
- in the result. */
-static WORD_LIST *
-expand_string_internal (string, quoted)
- char *string;
- int quoted;
-{
- WORD_DESC td;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == 0)
- return ((WORD_LIST *)NULL);
-
- td.flags = 0;
- td.word = savestring (string);
-
- tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
-
- FREE (td.word);
- return (tresult);
-}
-
-/* Expand STRING by performing parameter expansion, command substitution,
- and arithmetic expansion. Dequote the resulting WORD_LIST before
- returning it, but do not perform word splitting. The call to
- remove_quoted_nulls () is in here because word splitting normally
- takes care of quote removal. */
-WORD_LIST *
-expand_string_unsplit (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *value;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- expand_no_split_dollar_star = 1;
- value = expand_string_internal (string, quoted);
- expand_no_split_dollar_star = 0;
-
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-/* Expand the rhs of an assignment statement */
-WORD_LIST *
-expand_string_assignment (string, quoted)
- char *string;
- int quoted;
-{
- WORD_DESC td;
- WORD_LIST *value;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- expand_no_split_dollar_star = 1;
-
- td.flags = W_ASSIGNRHS;
- td.word = savestring (string);
- value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
- FREE (td.word);
-
- expand_no_split_dollar_star = 0;
-
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-
-/* Expand one of the PS? prompt strings. This is a sort of combination of
- expand_string_unsplit and expand_string_internal, but returns the
- passed string when an error occurs. Might want to trap other calls
- to jump_to_top_level here so we don't endlessly loop. */
-WORD_LIST *
-expand_prompt_string (string, quoted, wflags)
- char *string;
- int quoted;
- int wflags;
-{
- WORD_LIST *value;
- WORD_DESC td;
-
- if (string == 0 || *string == 0)
- return ((WORD_LIST *)NULL);
-
- td.flags = wflags;
- td.word = savestring (string);
-
- no_longjmp_on_fatal_error = 1;
- value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
- no_longjmp_on_fatal_error = 0;
-
- if (value == &expand_word_error || value == &expand_word_fatal)
- {
- value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL);
- return value;
- }
- FREE (td.word);
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-/* Expand STRING just as if you were expanding a word, but do not dequote
- the resultant WORD_LIST. This is called only from within this file,
- and is used to correctly preserve quoted characters when expanding
- things like ${1+"$@"}. This does parameter expansion, command
- substitution, arithmetic expansion, and word splitting. */
-static WORD_LIST *
-expand_string_leave_quoted (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *tlist;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- tlist = expand_string_internal (string, quoted);
-
- if (tlist)
- {
- tresult = word_list_split (tlist);
- dispose_words (tlist);
- return (tresult);
- }
- return ((WORD_LIST *)NULL);
-}
-
-/* This does not perform word splitting or dequote the WORD_LIST
- it returns. */
-static WORD_LIST *
-expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at)
- char *string;
- int quoted, *dollar_at_p, *has_dollar_at;
-{
- WORD_DESC td;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == '\0')
- return (WORD_LIST *)NULL;
-
- td.flags = W_NOSPLIT2; /* no splitting, remove "" and '' */
- td.word = string;
- tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at);
- return (tresult);
-}
-
-/* Expand STRING just as if you were expanding a word. This also returns
- a list of words. Note that filename globbing is *NOT* done for word
- or string expansion, just when the shell is expanding a command. This
- does parameter expansion, command substitution, arithmetic expansion,
- and word splitting. Dequote the resultant WORD_LIST before returning. */
-WORD_LIST *
-expand_string (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *result;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- result = expand_string_leave_quoted (string, quoted);
- return (result ? dequote_list (result) : result);
-}
-
-/***************************************************
- * *
- * Functions to handle quoting chars *
- * *
- ***************************************************/
-
-/* Conventions:
-
- A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string.
- The parser passes CTLNUL as CTLESC CTLNUL. */
-
-/* Quote escape characters in string s, but no other characters. This is
- used to protect CTLESC and CTLNUL in variable values from the rest of
- the word expansion process after the variable is expanded (word splitting
- and filename generation). If IFS is null, we quote spaces as well, just
- in case we split on spaces later (in the case of unquoted $@, we will
- eventually attempt to split the entire word on spaces). Corresponding
- code exists in dequote_escapes. Even if we don't end up splitting on
- spaces, quoting spaces is not a problem. This should never be called on
- a string that is quoted with single or double quotes or part of a here
- document (effectively double-quoted). */
-char *
-quote_escapes (string)
- char *string;
-{
- register char *s, *t;
- size_t slen;
- char *result, *send;
- int quote_spaces, skip_ctlesc, skip_ctlnul;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- quote_spaces = (ifs_value && *ifs_value == 0);
-
- for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
- skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-
- t = result = (char *)xmalloc ((slen * 2) + 1);
- s = string;
-
- while (*s)
- {
- if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' '))
- *t++ = CTLESC;
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return (result);
-}
-
-static WORD_LIST *
-list_quote_escapes (list)
- WORD_LIST *list;
-{
- register WORD_LIST *w;
- char *t;
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- w->word->word = quote_escapes (t);
- free (t);
- }
- return list;
-}
-
-/* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL.
-
- The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL.
- This is necessary to make unquoted CTLESC and CTLNUL characters in the
- data stream pass through properly.
-
- We need to remove doubled CTLESC characters inside quoted strings before
- quoting the entire string, so we do not double the number of CTLESC
- characters.
-
- Also used by parts of the pattern substitution code. */
-char *
-dequote_escapes (string)
- char *string;
-{
- register char *s, *t, *s1;
- size_t slen;
- char *result, *send;
- int quote_spaces;
- DECLARE_MBSTATE;
-
- if (string == 0)
- return string;
-
- slen = strlen (string);
- send = string + slen;
-
- t = result = (char *)xmalloc (slen + 1);
-
- if (strchr (string, CTLESC) == 0)
- return (strcpy (result, string));
-
- quote_spaces = (ifs_value && *ifs_value == 0);
-
- s = string;
- while (*s)
- {
- if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' ')))
- {
- s++;
- if (*s == '\0')
- break;
- }
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return result;
-}
-
-/* Return a new string with the quoted representation of character C.
- This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be
- set in any resultant WORD_DESC where this value is the word. */
-static char *
-make_quoted_char (c)
- int c;
-{
- char *temp;
-
- temp = (char *)xmalloc (3);
- if (c == 0)
- {
- temp[0] = CTLNUL;
- temp[1] = '\0';
- }
- else
- {
- temp[0] = CTLESC;
- temp[1] = c;
- temp[2] = '\0';
- }
- return (temp);
-}
-
-/* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so
- the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where
- this value is the word. */
-char *
-quote_string (string)
- char *string;
-{
- register char *t;
- size_t slen;
- char *result, *send;
-
- if (*string == 0)
- {
- result = (char *)xmalloc (2);
- result[0] = CTLNUL;
- result[1] = '\0';
- }
- else
- {
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- result = (char *)xmalloc ((slen * 2) + 1);
-
- for (t = result; string < send; )
- {
- *t++ = CTLESC;
- COPY_CHAR_P (t, string, send);
- }
- *t = '\0';
- }
- return (result);
-}
-
-/* De-quote quoted characters in STRING. */
-char *
-dequote_string (string)
- char *string;
-{
- register char *s, *t;
- size_t slen;
- char *result, *send;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
-
- t = result = (char *)xmalloc (slen + 1);
-
- if (QUOTED_NULL (string))
- {
- result[0] = '\0';
- return (result);
- }
-
- /* If no character in the string can be quoted, don't bother examining
- each character. Just return a copy of the string passed to us. */
- if (strchr (string, CTLESC) == NULL)
- return (strcpy (result, string));
-
- send = string + slen;
- s = string;
- while (*s)
- {
- if (*s == CTLESC)
- {
- s++;
- if (*s == '\0')
- break;
- }
- COPY_CHAR_P (t, s, send);
- }
-
- *t = '\0';
- return (result);
-}
-
-/* Quote the entire WORD_LIST list. */
-static WORD_LIST *
-quote_list (list)
- WORD_LIST *list;
-{
- register WORD_LIST *w;
- char *t;
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- w->word->word = quote_string (t);
- if (*t == 0)
- w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */
- w->word->flags |= W_QUOTED;
- free (t);
- }
- return list;
-}
-
-/* De-quote quoted characters in each word in LIST. */
-WORD_LIST *
-dequote_list (list)
- WORD_LIST *list;
-{
- register char *s;
- register WORD_LIST *tlist;
-
- for (tlist = list; tlist; tlist = tlist->next)
- {
- s = dequote_string (tlist->word->word);
- if (QUOTED_NULL (tlist->word->word))
- tlist->word->flags &= ~W_HASQUOTEDNULL;
- free (tlist->word->word);
- tlist->word->word = s;
- }
- return list;
-}
-
-/* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed
- string. */
-char *
-remove_quoted_escapes (string)
- char *string;
-{
- char *t;
-
- if (string)
- {
- t = dequote_escapes (string);
- strcpy (string, t);
- free (t);
- }
-
- return (string);
-}
-
-/* Perform quoted null character removal on STRING. We don't allow any
- quoted null characters in the middle or at the ends of strings because
- of how expand_word_internal works. remove_quoted_nulls () turns
- STRING into an empty string iff it only consists of a quoted null,
- and removes all unquoted CTLNUL characters. */
-char *
-remove_quoted_nulls (string)
- char *string;
-{
- register size_t slen;
- register int i, j, prev_i;
- DECLARE_MBSTATE;
-
- if (strchr (string, CTLNUL) == 0) /* XXX */
- return string; /* XXX */
-
- slen = strlen (string);
- i = j = 0;
-
- while (i < slen)
- {
- if (string[i] == CTLESC)
- {
- /* Old code had j++, but we cannot assume that i == j at this
- point -- what if a CTLNUL has already been removed from the
- string? We don't want to drop the CTLESC or recopy characters
- that we've already copied down. */
- i++; string[j++] = CTLESC;
- if (i == slen)
- break;
- }
- else if (string[i] == CTLNUL)
- {
- i++;
- continue;
- }
-
- prev_i = i;
- ADVANCE_CHAR (string, slen, i);
- if (j < prev_i)
- {
- do string[j++] = string[prev_i++]; while (prev_i < i);
- }
- else
- j = i;
- }
- string[j] = '\0';
-
- return (string);
-}
-
-/* Perform quoted null character removal on each element of LIST.
- This modifies LIST. */
-void
-word_list_remove_quoted_nulls (list)
- WORD_LIST *list;
-{
- register WORD_LIST *t;
-
- for (t = list; t; t = t->next)
- {
- remove_quoted_nulls (t->word->word);
- t->word->flags &= ~W_HASQUOTEDNULL;
- }
-}
-
-/* **************************************************************** */
-/* */
-/* Functions for Matching and Removing Patterns */
-/* */
-/* **************************************************************** */
-
-#if defined (HANDLE_MULTIBYTE)
-#if 0 /* Currently unused */
-static unsigned char *
-mb_getcharlens (string, len)
- char *string;
- int len;
-{
- int i, offset, last;
- unsigned char *ret;
- char *p;
- DECLARE_MBSTATE;
-
- i = offset = 0;
- last = 0;
- ret = (unsigned char *)xmalloc (len);
- memset (ret, 0, len);
- while (string[last])
- {
- ADVANCE_CHAR (string, len, offset);
- ret[last] = offset - last;
- last = offset;
- }
- return ret;
-}
-#endif
-#endif
-
-/* Remove the portion of PARAM matched by PATTERN according to OP, where OP
- can have one of 4 values:
- RP_LONG_LEFT remove longest matching portion at start of PARAM
- RP_SHORT_LEFT remove shortest matching portion at start of PARAM
- RP_LONG_RIGHT remove longest matching portion at end of PARAM
- RP_SHORT_RIGHT remove shortest matching portion at end of PARAM
-*/
-
-#define RP_LONG_LEFT 1
-#define RP_SHORT_LEFT 2
-#define RP_LONG_RIGHT 3
-#define RP_SHORT_RIGHT 4
-
-/* Returns its first argument if nothing matched; new memory otherwise */
-static char *
-remove_upattern (param, pattern, op)
- char *param, *pattern;
- int op;
-{
- register int len;
- register char *end;
- register char *p, *ret, c;
-
- len = STRLEN (param);
- end = param + len;
-
- switch (op)
- {
- case RP_LONG_LEFT: /* remove longest match at start */
- for (p = end; p >= param; p--)
- {
- c = *p; *p = '\0';
- if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- *p = c;
- return (savestring (p));
- }
- *p = c;
-
- }
- break;
-
- case RP_SHORT_LEFT: /* remove shortest match at start */
- for (p = param; p <= end; p++)
- {
- c = *p; *p = '\0';
- if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- *p = c;
- return (savestring (p));
- }
- *p = c;
- }
- break;
-
- case RP_LONG_RIGHT: /* remove longest match at end */
- for (p = param; p <= end; p++)
- {
- if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- c = *p; *p = '\0';
- ret = savestring (param);
- *p = c;
- return (ret);
- }
- }
- break;
-
- case RP_SHORT_RIGHT: /* remove shortest match at end */
- for (p = end; p >= param; p--)
- {
- if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- c = *p; *p = '\0';
- ret = savestring (param);
- *p = c;
- return (ret);
- }
- }
- break;
- }
-
- return (param); /* no match, return original string */
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Returns its first argument if nothing matched; new memory otherwise */
-static wchar_t *
-remove_wpattern (wparam, wstrlen, wpattern, op)
- wchar_t *wparam;
- size_t wstrlen;
- wchar_t *wpattern;
- int op;
-{
- wchar_t wc, *ret;
- int n;
-
- switch (op)
- {
- case RP_LONG_LEFT: /* remove longest match at start */
- for (n = wstrlen; n >= 0; n--)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wparam[n] = wc;
- return (wcsdup (wparam + n));
- }
- wparam[n] = wc;
- }
- break;
-
- case RP_SHORT_LEFT: /* remove shortest match at start */
- for (n = 0; n <= wstrlen; n++)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wparam[n] = wc;
- return (wcsdup (wparam + n));
- }
- wparam[n] = wc;
- }
- break;
-
- case RP_LONG_RIGHT: /* remove longest match at end */
- for (n = 0; n <= wstrlen; n++)
- {
- if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- ret = wcsdup (wparam);
- wparam[n] = wc;
- return (ret);
- }
- }
- break;
-
- case RP_SHORT_RIGHT: /* remove shortest match at end */
- for (n = wstrlen; n >= 0; n--)
- {
- if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- ret = wcsdup (wparam);
- wparam[n] = wc;
- return (ret);
- }
- }
- break;
- }
-
- return (wparam); /* no match, return original string */
-}
-#endif /* HANDLE_MULTIBYTE */
-
-static char *
-remove_pattern (param, pattern, op)
- char *param, *pattern;
- int op;
-{
- char *xret;
-
- if (param == NULL)
- return (param);
- if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */
- return (savestring (param));
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- {
- wchar_t *ret, *oret;
- size_t n;
- wchar_t *wparam, *wpattern;
- mbstate_t ps;
-
- n = xdupmbstowcs (&wpattern, NULL, pattern);
- if (n == (size_t)-1)
- {
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
- n = xdupmbstowcs (&wparam, NULL, param);
-
- if (n == (size_t)-1)
- {
- free (wpattern);
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
- oret = ret = remove_wpattern (wparam, n, wpattern, op);
- /* Don't bother to convert wparam back to multibyte string if nothing
- matched; just return copy of original string */
- if (ret == wparam)
- {
- free (wparam);
- free (wpattern);
- return (savestring (param));
- }
-
- free (wparam);
- free (wpattern);
-
- n = strlen (param);
- xret = (char *)xmalloc (n + 1);
- memset (&ps, '\0', sizeof (mbstate_t));
- n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps);
- xret[n] = '\0'; /* just to make sure */
- free (oret);
- return xret;
- }
- else
-#endif
- {
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
-}
-
-/* Match PAT anywhere in STRING and return the match boundaries.
- This returns 1 in case of a successful match, 0 otherwise. SP
- and EP are pointers into the string where the match begins and
- ends, respectively. MTYPE controls what kind of match is attempted.
- MATCH_BEG and MATCH_END anchor the match at the beginning and end
- of the string, respectively. The longest match is returned. */
-static int
-match_upattern (string, pat, mtype, sp, ep)
- char *string, *pat;
- int mtype;
- char **sp, **ep;
-{
- int c, len, mlen;
- register char *p, *p1, *npat;
- char *end;
- int n1;
-
- /* If the pattern doesn't match anywhere in the string, go ahead and
- short-circuit right away. A minor optimization, saves a bunch of
- unnecessary calls to strmatch (up to N calls for a string of N
- characters) if the match is unsuccessful. To preserve the semantics
- of the substring matches below, we make sure that the pattern has
- `*' as first and last character, making a new pattern if necessary. */
- /* XXX - check this later if I ever implement `**' with special meaning,
- since this will potentially result in `**' at the beginning or end */
- len = STRLEN (pat);
- if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*')
- {
- p = npat = (char *)xmalloc (len + 3);
- p1 = pat;
- if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob))
- *p++ = '*';
- while (*p1)
- *p++ = *p1++;
- if (p1[-1] != '*' || p[-2] == '\\')
- *p++ = '*';
- *p = '\0';
- }
- else
- npat = pat;
- c = strmatch (npat, string, FNMATCH_EXTFLAG);
- if (npat != pat)
- free (npat);
- if (c == FNM_NOMATCH)
- return (0);
-
- len = STRLEN (string);
- end = string + len;
-
- mlen = umatchlen (pat, len);
-
- switch (mtype)
- {
- case MATCH_ANY:
- for (p = string; p <= end; p++)
- {
- if (match_pattern_char (pat, p))
- {
- p1 = (mlen == -1) ? end : p + mlen;
- /* p1 - p = length of portion of string to be considered
- p = current position in string
- mlen = number of characters consumed by match (-1 for entire string)
- end = end of string
- we want to break immediately if the potential match len
- is greater than the number of characters remaining in the
- string
- */
- if (p1 > end)
- break;
- for ( ; p1 >= p; p1--)
- {
- c = *p1; *p1 = '\0';
- if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
- {
- *p1 = c;
- *sp = p;
- *ep = p1;
- return 1;
- }
- *p1 = c;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
- }
- }
-
- return (0);
-
- case MATCH_BEG:
- if (match_pattern_char (pat, string) == 0)
- return (0);
-
- for (p = (mlen == -1) ? end : string + mlen; p >= string; p--)
- {
- c = *p; *p = '\0';
- if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0)
- {
- *p = c;
- *sp = string;
- *ep = p;
- return 1;
- }
- *p = c;
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
- }
-
- return (0);
-
- case MATCH_END:
- for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++)
- {
- if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
- {
- *sp = p;
- *ep = end;
- return 1;
- }
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
- }
-
- return (0);
- }
-
- return (0);
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Match WPAT anywhere in WSTRING and return the match boundaries.
- This returns 1 in case of a successful match, 0 otherwise. Wide
- character version. */
-static int
-match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep)
- wchar_t *wstring;
- char **indices;
- size_t wstrlen;
- wchar_t *wpat;
- int mtype;
- char **sp, **ep;
-{
- wchar_t wc, *wp, *nwpat, *wp1;
- size_t len;
- int mlen;
- int n, n1, n2, simple;
-
- simple = (wpat[0] != L'\\' && wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'[');
-#if defined (EXTENDED_GLOB)
- if (extended_glob)
- simple &= (wpat[1] != L'(' || (wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'+' && wpat[0] != L'!' && wpat[0] != L'@')); /*)*/
-#endif
-
- /* If the pattern doesn't match anywhere in the string, go ahead and
- short-circuit right away. A minor optimization, saves a bunch of
- unnecessary calls to strmatch (up to N calls for a string of N
- characters) if the match is unsuccessful. To preserve the semantics
- of the substring matches below, we make sure that the pattern has
- `*' as first and last character, making a new pattern if necessary. */
- len = wcslen (wpat);
- if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*')
- {
- wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t));
- wp1 = wpat;
- if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob))
- *wp++ = L'*';
- while (*wp1 != L'\0')
- *wp++ = *wp1++;
- if (wp1[-1] != L'*' || wp1[-2] == L'\\')
- *wp++ = L'*';
- *wp = '\0';
- }
- else
- nwpat = wpat;
- len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG);
- if (nwpat != wpat)
- free (nwpat);
- if (len == FNM_NOMATCH)
- return (0);
-
- mlen = wmatchlen (wpat, wstrlen);
-
-/* itrace("wmatchlen (%ls) -> %d", wpat, mlen); */
- switch (mtype)
- {
- case MATCH_ANY:
- for (n = 0; n <= wstrlen; n++)
- {
- n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n);
- if (n2)
- {
- n1 = (mlen == -1) ? wstrlen : n + mlen;
- if (n1 > wstrlen)
- break;
-
- for ( ; n1 >= n; n1--)
- {
- wc = wstring[n1]; wstring[n1] = L'\0';
- if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
- {
- wstring[n1] = wc;
- *sp = indices[n];
- *ep = indices[n1];
- return 1;
- }
- wstring[n1] = wc;
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
- }
- }
- }
-
- return (0);
-
- case MATCH_BEG:
- if (match_pattern_wchar (wpat, wstring) == 0)
- return (0);
-
- for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--)
- {
- wc = wstring[n]; wstring[n] = L'\0';
- if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0)
- {
- wstring[n] = wc;
- *sp = indices[0];
- *ep = indices[n];
- return 1;
- }
- wstring[n] = wc;
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
- }
-
- return (0);
-
- case MATCH_END:
- for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++)
- {
- if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
- {
- *sp = indices[n];
- *ep = indices[wstrlen];
- return 1;
- }
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
- }
-
- return (0);
- }
-
- return (0);
-}
-#endif /* HANDLE_MULTIBYTE */
-
-static int
-match_pattern (string, pat, mtype, sp, ep)
- char *string, *pat;
- int mtype;
- char **sp, **ep;
-{
-#if defined (HANDLE_MULTIBYTE)
- int ret;
- size_t n;
- wchar_t *wstring, *wpat;
- char **indices;
- size_t slen, plen, mslen, mplen, wn;
-#endif
-
- if (string == 0 || *string == 0 || pat == 0 || *pat == 0)
- return (0);
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- {
- if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0)
- return (match_upattern (string, pat, mtype, sp, ep));
-
- n = xdupmbstowcs (&wpat, NULL, pat);
- if (n == (size_t)-1)
- return (match_upattern (string, pat, mtype, sp, ep));
- n = xdupmbstowcs (&wstring, &indices, string);
- if (n == (size_t)-1)
- {
- free (wpat);
- return (match_upattern (string, pat, mtype, sp, ep));
- }
-wn = wstring ? wcslen (wstring) : 0;
-if (n != wn)
- itrace("xdupmbstowcs returns %d != length of wstring %d", n, wn);
- ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep);
-
- free (wpat);
- free (wstring);
- free (indices);
-
- return (ret);
- }
- else
-#endif
- return (match_upattern (string, pat, mtype, sp, ep));
-}
-
-static int
-getpatspec (c, value)
- int c;
- char *value;
-{
- if (c == '#')
- return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT);
- else /* c == '%' */
- return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT);
-}
-
-/* Posix.2 says that the WORD should be run through tilde expansion,
- parameter expansion, command substitution and arithmetic expansion.
- This leaves the result quoted, so quote_string_for_globbing () has
- to be called to fix it up for strmatch (). If QUOTED is non-zero,
- it means that the entire expression was enclosed in double quotes.
- This means that quoting characters in the pattern do not make any
- special pattern characters quoted. For example, the `*' in the
- following retains its special meaning: "${foo#'*'}". */
-static char *
-getpattern (value, quoted, expandpat)
- char *value;
- int quoted, expandpat;
-{
- char *pat, *tword;
- WORD_LIST *l;
-#if 0
- int i;
-#endif
- /* There is a problem here: how to handle single or double quotes in the
- pattern string when the whole expression is between double quotes?
- POSIX.2 says that enclosing double quotes do not cause the pattern to
- be quoted, but does that leave us a problem with @ and array[@] and their
- expansions inside a pattern? */
-#if 0
- if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword)
- {
- i = 0;
- pat = string_extract_double_quoted (tword, &i, 1);
- free (tword);
- tword = pat;
- }
-#endif
-
- /* expand_string_for_rhs () leaves WORD quoted and does not perform
- word splitting. */
- l = *value ? expand_string_for_rhs (value,
- (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted,
- (int *)NULL, (int *)NULL)
- : (WORD_LIST *)0;
- pat = string_list (l);
- dispose_words (l);
- if (pat)
- {
- tword = quote_string_for_globbing (pat, QGLOB_CVTNULL);
- free (pat);
- pat = tword;
- }
- return (pat);
-}
-
-#if 0
-/* Handle removing a pattern from a string as a result of ${name%[%]value}
- or ${name#[#]value}. */
-static char *
-variable_remove_pattern (value, pattern, patspec, quoted)
- char *value, *pattern;
- int patspec, quoted;
-{
- char *tword;
-
- tword = remove_pattern (value, pattern, patspec);
-
- return (tword);
-}
-#endif
-
-static char *
-list_remove_pattern (list, pattern, patspec, itype, quoted)
- WORD_LIST *list;
- char *pattern;
- int patspec, itype, quoted;
-{
- WORD_LIST *new, *l;
- WORD_DESC *w;
- char *tword;
-
- for (new = (WORD_LIST *)NULL, l = list; l; l = l->next)
- {
- tword = remove_pattern (l->word->word, pattern, patspec);
- w = alloc_word_desc ();
- w->word = tword ? tword : savestring ("");
- new = make_word_list (w, new);
- }
-
- l = REVERSE_LIST (new, WORD_LIST *);
- tword = string_list_pos_params (itype, l, quoted);
- dispose_words (l);
-
- return (tword);
-}
-
-static char *
-parameter_list_remove_pattern (itype, pattern, patspec, quoted)
- int itype;
- char *pattern;
- int patspec, quoted;
-{
- char *ret;
- WORD_LIST *list;
-
- list = list_rest_of_args ();
- if (list == 0)
- return ((char *)NULL);
- ret = list_remove_pattern (list, pattern, patspec, itype, quoted);
- dispose_words (list);
- return (ret);
-}
-
-#if defined (ARRAY_VARS)
-static char *
-array_remove_pattern (var, pattern, patspec, varname, quoted)
- SHELL_VAR *var;
- char *pattern;
- int patspec;
- char *varname; /* so we can figure out how it's indexed */
- int quoted;
-{
- ARRAY *a;
- HASH_TABLE *h;
- int itype;
- char *ret;
- WORD_LIST *list;
- SHELL_VAR *v;
-
- /* compute itype from varname here */
- v = array_variable_part (varname, &ret, 0);
- itype = ret[0];
-
- a = (v && array_p (v)) ? array_cell (v) : 0;
- h = (v && assoc_p (v)) ? assoc_cell (v) : 0;
-
- list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0);
- if (list == 0)
- return ((char *)NULL);
- ret = list_remove_pattern (list, pattern, patspec, itype, quoted);
- dispose_words (list);
-
- return ret;
-}
-#endif /* ARRAY_VARS */
-
-static char *
-parameter_brace_remove_pattern (varname, value, ind, patstr, rtype, quoted, flags)
- char *varname, *value;
- int ind;
- char *patstr;
- int rtype, quoted, flags;
-{
- int vtype, patspec, starsub;
- char *temp1, *val, *pattern;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- patspec = getpatspec (rtype, patstr);
- if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT)
- patstr++;
-
- /* Need to pass getpattern newly-allocated memory in case of expansion --
- the expansion code will free the passed string on an error. */
- temp1 = savestring (patstr);
- pattern = getpattern (temp1, quoted, 1);
- free (temp1);
-
- temp1 = (char *)NULL; /* shut up gcc */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp1 = remove_pattern (val, pattern, patspec);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp1)
- {
- val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- ? quote_string (temp1)
- : quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted);
- if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- {
- val = quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
-#endif
- case VT_POSPARMS:
- temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted);
- if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- {
- val = quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
- }
-
- FREE (pattern);
- return temp1;
-}
-
-/*******************************************
- * *
- * Functions to expand WORD_DESCs *
- * *
- *******************************************/
-
-/* Expand WORD, performing word splitting on the result. This does
- parameter expansion, command substitution, arithmetic expansion,
- word splitting, and quote removal. */
-
-WORD_LIST *
-expand_word (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result, *tresult;
-
- tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- result = word_list_split (tresult);
- dispose_words (tresult);
- return (result ? dequote_list (result) : result);
-}
-
-/* Expand WORD, but do not perform word splitting on the result. This
- does parameter expansion, command substitution, arithmetic expansion,
- and quote removal. */
-WORD_LIST *
-expand_word_unsplit (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result;
-
- expand_no_split_dollar_star = 1;
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc[0] == 0)
-#else
- if (ifs_firstc == 0)
-#endif
- word->flags |= W_NOSPLIT;
- word->flags |= W_NOSPLIT2;
- result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- expand_no_split_dollar_star = 0;
-
- return (result ? dequote_list (result) : result);
-}
-
-/* Perform shell expansions on WORD, but do not perform word splitting or
- quote removal on the result. Virtually identical to expand_word_unsplit;
- could be combined if implementations don't diverge. */
-WORD_LIST *
-expand_word_leave_quoted (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result;
-
- expand_no_split_dollar_star = 1;
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc[0] == 0)
-#else
- if (ifs_firstc == 0)
-#endif
- word->flags |= W_NOSPLIT;
- word->flags |= W_NOSPLIT2;
- result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- expand_no_split_dollar_star = 0;
-
- return result;
-}
-
-#if defined (PROCESS_SUBSTITUTION)
-
-/*****************************************************************/
-/* */
-/* Hacking Process Substitution */
-/* */
-/*****************************************************************/
-
-#if !defined (HAVE_DEV_FD)
-/* Named pipes must be removed explicitly with `unlink'. This keeps a list
- of FIFOs the shell has open. unlink_fifo_list will walk the list and
- unlink all of them. add_fifo_list adds the name of an open FIFO to the
- list. NFIFO is a count of the number of FIFOs in the list. */
-#define FIFO_INCR 20
-
-struct temp_fifo {
- char *file;
- pid_t proc;
-};
-
-static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL;
-static int nfifo;
-static int fifo_list_size;
-
-char *
-copy_fifo_list (sizep)
- int *sizep;
-{
- if (sizep)
- *sizep = 0;
- return (char *)NULL;
-}
-
-static void
-add_fifo_list (pathname)
- char *pathname;
-{
- if (nfifo >= fifo_list_size - 1)
- {
- fifo_list_size += FIFO_INCR;
- fifo_list = (struct temp_fifo *)xrealloc (fifo_list,
- fifo_list_size * sizeof (struct temp_fifo));
- }
-
- fifo_list[nfifo].file = savestring (pathname);
- nfifo++;
-}
-
-void
-unlink_fifo (i)
- int i;
-{
- if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1))
- {
- unlink (fifo_list[i].file);
- free (fifo_list[i].file);
- fifo_list[i].file = (char *)NULL;
- fifo_list[i].proc = -1;
- }
-}
-
-void
-unlink_fifo_list ()
-{
- int saved, i, j;
-
- if (nfifo == 0)
- return;
-
- for (i = saved = 0; i < nfifo; i++)
- {
- if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1))
- {
- unlink (fifo_list[i].file);
- free (fifo_list[i].file);
- fifo_list[i].file = (char *)NULL;
- fifo_list[i].proc = -1;
- }
- else
- saved++;
- }
-
- /* If we didn't remove some of the FIFOs, compact the list. */
- if (saved)
- {
- for (i = j = 0; i < nfifo; i++)
- if (fifo_list[i].file)
- {
- fifo_list[j].file = fifo_list[i].file;
- fifo_list[j].proc = fifo_list[i].proc;
- j++;
- }
- nfifo = j;
- }
- else
- nfifo = 0;
-}
-
-/* Take LIST, which is a bitmap denoting active FIFOs in fifo_list
- from some point in the past, and close all open FIFOs in fifo_list
- that are not marked as active in LIST. If LIST is NULL, close
- everything in fifo_list. LSIZE is the number of elements in LIST, in
- case it's larger than fifo_list_size (size of fifo_list). */
-void
-close_new_fifos (list, lsize)
- char *list;
- int lsize;
-{
- int i;
-
- if (list == 0)
- {
- unlink_fifo_list ();
- return;
- }
-
- for (i = 0; i < lsize; i++)
- if (list[i] == 0 && i < fifo_list_size && fifo_list[i].proc != -1)
- unlink_fifo (i);
-
- for (i = lsize; i < fifo_list_size; i++)
- unlink_fifo (i);
-}
-
-int
-fifos_pending ()
-{
- return nfifo;
-}
-
-int
-num_fifos ()
-{
- return nfifo;
-}
-
-static char *
-make_named_pipe ()
-{
- char *tname;
-
- tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR);
- if (mkfifo (tname, 0600) < 0)
- {
- free (tname);
- return ((char *)NULL);
- }
-
- add_fifo_list (tname);
- return (tname);
-}
-
-#else /* HAVE_DEV_FD */
-
-/* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell
- has open to children. NFDS is a count of the number of bits currently
- set in DEV_FD_LIST. TOTFDS is a count of the highest possible number
- of open files. */
-static char *dev_fd_list = (char *)NULL;
-static int nfds;
-static int totfds; /* The highest possible number of open files. */
-
-char *
-copy_fifo_list (sizep)
- int *sizep;
-{
- char *ret;
-
- if (nfds == 0 || totfds == 0)
- {
- if (sizep)
- *sizep = 0;
- return (char *)NULL;
- }
-
- if (sizep)
- *sizep = totfds;
- ret = (char *)xmalloc (totfds);
- return (memcpy (ret, dev_fd_list, totfds));
-}
-
-static void
-add_fifo_list (fd)
- int fd;
-{
- if (dev_fd_list == 0 || fd >= totfds)
- {
- int ofds;
-
- ofds = totfds;
- totfds = getdtablesize ();
- if (totfds < 0 || totfds > 256)
- totfds = 256;
- if (fd >= totfds)
- totfds = fd + 2;
-
- dev_fd_list = (char *)xrealloc (dev_fd_list, totfds);
- memset (dev_fd_list + ofds, '\0', totfds - ofds);
- }
-
- dev_fd_list[fd] = 1;
- nfds++;
-}
-
-int
-fifos_pending ()
-{
- return 0; /* used for cleanup; not needed with /dev/fd */
-}
-
-int
-num_fifos ()
-{
- return nfds;
-}
-
-void
-unlink_fifo (fd)
- int fd;
-{
- if (dev_fd_list[fd])
- {
- close (fd);
- dev_fd_list[fd] = 0;
- nfds--;
- }
-}
-
-void
-unlink_fifo_list ()
-{
- register int i;
-
- if (nfds == 0)
- return;
-
- for (i = 0; nfds && i < totfds; i++)
- unlink_fifo (i);
-
- nfds = 0;
-}
-
-/* Take LIST, which is a snapshot copy of dev_fd_list from some point in
- the past, and close all open fds in dev_fd_list that are not marked
- as open in LIST. If LIST is NULL, close everything in dev_fd_list.
- LSIZE is the number of elements in LIST, in case it's larger than
- totfds (size of dev_fd_list). */
-void
-close_new_fifos (list, lsize)
- char *list;
- int lsize;
-{
- int i;
-
- if (list == 0)
- {
- unlink_fifo_list ();
- return;
- }
-
- for (i = 0; i < lsize; i++)
- if (list[i] == 0 && i < totfds && dev_fd_list[i])
- unlink_fifo (i);
-
- for (i = lsize; i < totfds; i++)
- unlink_fifo (i);
-}
-
-#if defined (NOTDEF)
-print_dev_fd_list ()
-{
- register int i;
-
- fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ());
- fflush (stderr);
-
- for (i = 0; i < totfds; i++)
- {
- if (dev_fd_list[i])
- fprintf (stderr, " %d", i);
- }
- fprintf (stderr, "\n");
-}
-#endif /* NOTDEF */
-
-static char *
-make_dev_fd_filename (fd)
- int fd;
-{
- char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p;
-
- ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8);
-
- strcpy (ret, DEV_FD_PREFIX);
- p = inttostr (fd, intbuf, sizeof (intbuf));
- strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p);
-
- add_fifo_list (fd);
- return (ret);
-}
-
-#endif /* HAVE_DEV_FD */
-
-/* Return a filename that will open a connection to the process defined by
- executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return
- a filename in /dev/fd corresponding to a descriptor that is one of the
- ends of the pipe. If not defined, we use named pipes on systems that have
- them. Systems without /dev/fd and named pipes are out of luck.
-
- OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or
- use the read end of the pipe and dup that file descriptor to fd 0 in
- the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for
- writing or use the write end of the pipe in the child, and dup that
- file descriptor to fd 1 in the child. The parent does the opposite. */
-
-static char *
-process_substitute (string, open_for_read_in_child)
- char *string;
- int open_for_read_in_child;
-{
- char *pathname;
- int fd, result;
- pid_t old_pid, pid;
-#if defined (HAVE_DEV_FD)
- int parent_pipe_fd, child_pipe_fd;
- int fildes[2];
-#endif /* HAVE_DEV_FD */
-#if defined (JOB_CONTROL)
- pid_t old_pipeline_pgrp;
-#endif
-
- if (!string || !*string || wordexp_only)
- return ((char *)NULL);
-
-#if !defined (HAVE_DEV_FD)
- pathname = make_named_pipe ();
-#else /* HAVE_DEV_FD */
- if (pipe (fildes) < 0)
- {
- sys_error (_("cannot make pipe for process substitution"));
- return ((char *)NULL);
- }
- /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of
- the pipe in the parent, otherwise the read end. */
- parent_pipe_fd = fildes[open_for_read_in_child];
- child_pipe_fd = fildes[1 - open_for_read_in_child];
- /* Move the parent end of the pipe to some high file descriptor, to
- avoid clashes with FDs used by the script. */
- parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64);
-
- pathname = make_dev_fd_filename (parent_pipe_fd);
-#endif /* HAVE_DEV_FD */
-
- if (pathname == 0)
- {
- sys_error (_("cannot make pipe for process substitution"));
- return ((char *)NULL);
- }
-
- old_pid = last_made_pid;
-
-#if defined (JOB_CONTROL)
- old_pipeline_pgrp = pipeline_pgrp;
- pipeline_pgrp = shell_pgrp;
- save_pipeline (1);
-#endif /* JOB_CONTROL */
-
- pid = make_child ((char *)NULL, 1);
- if (pid == 0)
- {
- reset_terminating_signals (); /* XXX */
- free_pushed_string_input ();
- /* Cancel traps, in trap.c. */
- restore_original_signals (); /* XXX - what about special builtins? bash-4.2 */
- setup_async_signals ();
- subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB;
- }
-
-#if defined (JOB_CONTROL)
- set_sigchld_handler ();
- stop_making_children ();
- /* XXX - should we only do this in the parent? (as in command subst) */
- pipeline_pgrp = old_pipeline_pgrp;
-#endif /* JOB_CONTROL */
-
- if (pid < 0)
- {
- sys_error (_("cannot make child for process substitution"));
- free (pathname);
-#if defined (HAVE_DEV_FD)
- close (parent_pipe_fd);
- close (child_pipe_fd);
-#endif /* HAVE_DEV_FD */
- return ((char *)NULL);
- }
-
- if (pid > 0)
- {
-#if defined (JOB_CONTROL)
- restore_pipeline (1);
-#endif
-
-#if !defined (HAVE_DEV_FD)
- fifo_list[nfifo-1].proc = pid;
-#endif
-
- last_made_pid = old_pid;
-
-#if defined (JOB_CONTROL) && defined (PGRP_PIPE)
- close_pgrp_pipe ();
-#endif /* JOB_CONTROL && PGRP_PIPE */
-
-#if defined (HAVE_DEV_FD)
- close (child_pipe_fd);
-#endif /* HAVE_DEV_FD */
-
- return (pathname);
- }
-
- set_sigint_handler ();
-
-#if defined (JOB_CONTROL)
- set_job_control (0);
-#endif /* JOB_CONTROL */
-
-#if !defined (HAVE_DEV_FD)
- /* Open the named pipe in the child. */
- fd = open (pathname, open_for_read_in_child ? O_RDONLY|O_NONBLOCK : O_WRONLY);
- if (fd < 0)
- {
- /* Two separate strings for ease of translation. */
- if (open_for_read_in_child)
- sys_error (_("cannot open named pipe %s for reading"), pathname);
- else
- sys_error (_("cannot open named pipe %s for writing"), pathname);
-
- exit (127);
- }
- if (open_for_read_in_child)
- {
- if (sh_unset_nodelay_mode (fd) < 0)
- {
- sys_error (_("cannot reset nodelay mode for fd %d"), fd);
- exit (127);
- }
- }
-#else /* HAVE_DEV_FD */
- fd = child_pipe_fd;
-#endif /* HAVE_DEV_FD */
-
- if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0)
- {
- sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname,
- open_for_read_in_child ? 0 : 1);
- exit (127);
- }
-
- if (fd != (open_for_read_in_child ? 0 : 1))
- close (fd);
-
- /* Need to close any files that this process has open to pipes inherited
- from its parent. */
- if (current_fds_to_close)
- {
- close_fd_bitmap (current_fds_to_close);
- current_fds_to_close = (struct fd_bitmap *)NULL;
- }
-
-#if defined (HAVE_DEV_FD)
- /* Make sure we close the parent's end of the pipe and clear the slot
- in the fd list so it is not closed later, if reallocated by, for
- instance, pipe(2). */
- close (parent_pipe_fd);
- dev_fd_list[parent_pipe_fd] = 0;
-#endif /* HAVE_DEV_FD */
-
- /* subshells shouldn't have this flag, which controls using the temporary
- environment for variable lookups. */
- expanding_redir = 0;
-
- result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST));
-
-#if !defined (HAVE_DEV_FD)
- /* Make sure we close the named pipe in the child before we exit. */
- close (open_for_read_in_child ? 0 : 1);
-#endif /* !HAVE_DEV_FD */
-
- exit (result);
- /*NOTREACHED*/
-}
-#endif /* PROCESS_SUBSTITUTION */
-
-/***********************************/
-/* */
-/* Command Substitution */
-/* */
-/***********************************/
-
-static char *
-read_comsub (fd, quoted, rflag)
- int fd, quoted;
- int *rflag;
-{
- char *istring, buf[128], *bufp, *s;
- int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul;
- ssize_t bufn;
-
- istring = (char *)NULL;
- istring_index = istring_size = bufn = tflag = 0;
-
- for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
- skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-
- /* Read the output of the command through the pipe. This may need to be
- changed to understand multibyte characters in the future. */
- while (1)
- {
- if (fd < 0)
- break;
- if (--bufn <= 0)
- {
- bufn = zread (fd, buf, sizeof (buf));
- if (bufn <= 0)
- break;
- bufp = buf;
- }
- c = *bufp++;
-
- if (c == 0)
- {
-#if 0
- internal_warning ("read_comsub: ignored null byte in input");
-#endif
- continue;
- }
-
- /* Add the character to ISTRING, possibly after resizing it. */
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE);
-
- /* This is essentially quote_string inline */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */)
- istring[istring_index++] = CTLESC;
- /* Escape CTLESC and CTLNUL in the output to protect those characters
- from the rest of the word expansions (word splitting and globbing.)
- This is essentially quote_escapes inline. */
- else if (skip_ctlesc == 0 && c == CTLESC)
- {
- tflag |= W_HASCTLESC;
- istring[istring_index++] = CTLESC;
- }
- else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0)))
- istring[istring_index++] = CTLESC;
-
- istring[istring_index++] = c;
-
-#if 0
-#if defined (__CYGWIN__)
- if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r')
- {
- istring_index--;
- istring[istring_index - 1] = '\n';
- }
-#endif
-#endif
- }
-
- if (istring)
- istring[istring_index] = '\0';
-
- /* If we read no output, just return now and save ourselves some
- trouble. */
- if (istring_index == 0)
- {
- FREE (istring);
- if (rflag)
- *rflag = tflag;
- return (char *)NULL;
- }
-
- /* Strip trailing newlines from the output of the command. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- {
- while (istring_index > 0)
- {
- if (istring[istring_index - 1] == '\n')
- {
- --istring_index;
-
- /* If the newline was quoted, remove the quoting char. */
- if (istring[istring_index - 1] == CTLESC)
- --istring_index;
- }
- else
- break;
- }
- istring[istring_index] = '\0';
- }
- else
- strip_trailing (istring, istring_index - 1, 1);
-
- if (rflag)
- *rflag = tflag;
- return istring;
-}
-
-/* Perform command substitution on STRING. This returns a WORD_DESC * with the
- contained string possibly quoted. */
-WORD_DESC *
-command_substitute (string, quoted)
- char *string;
- int quoted;
-{
- pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid;
- char *istring;
- int result, fildes[2], function_value, pflags, rc, tflag;
- WORD_DESC *ret;
-
- istring = (char *)NULL;
-
- /* Don't fork () if there is no need to. In the case of no command to
- run, just return NULL. */
- if (!string || !*string || (string[0] == '\n' && !string[1]))
- return ((WORD_DESC *)NULL);
-
- if (wordexp_only && read_but_dont_execute)
- {
- last_command_exit_value = EX_WEXPCOMSUB;
- jump_to_top_level (EXITPROG);
- }
-
- /* We're making the assumption here that the command substitution will
- eventually run a command from the file system. Since we'll run
- maybe_make_export_env in this subshell before executing that command,
- the parent shell and any other shells it starts will have to remake
- the environment. If we make it before we fork, other shells won't
- have to. Don't bother if we have any temporary variable assignments,
- though, because the export environment will be remade after this
- command completes anyway, but do it if all the words to be expanded
- are variable assignments. */
- if (subst_assign_varlist == 0 || garglist == 0)
- maybe_make_export_env (); /* XXX */
-
- /* Flags to pass to parse_and_execute() */
- pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0;
-
- /* Pipe the output of executing STRING into the current shell. */
- if (pipe (fildes) < 0)
- {
- sys_error (_("cannot make pipe for command substitution"));
- goto error_exit;
- }
-
- old_pid = last_made_pid;
-#if defined (JOB_CONTROL)
- old_pipeline_pgrp = pipeline_pgrp;
- /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */
- if ((subshell_environment & SUBSHELL_PIPE) == 0)
- pipeline_pgrp = shell_pgrp;
- cleanup_the_pipeline ();
-#endif /* JOB_CONTROL */
-
- old_async_pid = last_asynchronous_pid;
- pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC);
- last_asynchronous_pid = old_async_pid;
-
- if (pid == 0)
- {
- /* Reset the signal handlers in the child, but don't free the
- trap strings. Set a flag noting that we have to free the
- trap strings if we run trap to change a signal disposition. */
- reset_signal_handlers ();
- subshell_environment |= SUBSHELL_RESETTRAP;
- }
-
-#if defined (JOB_CONTROL)
- /* XXX DO THIS ONLY IN PARENT ? XXX */
- set_sigchld_handler ();
- stop_making_children ();
- if (pid != 0)
- pipeline_pgrp = old_pipeline_pgrp;
-#else
- stop_making_children ();
-#endif /* JOB_CONTROL */
-
- if (pid < 0)
- {
- sys_error (_("cannot make child for command substitution"));
- error_exit:
-
- last_made_pid = old_pid;
-
- FREE (istring);
- close (fildes[0]);
- close (fildes[1]);
- return ((WORD_DESC *)NULL);
- }
-
- if (pid == 0)
- {
- set_sigint_handler (); /* XXX */
-
- free_pushed_string_input ();
-
- if (dup2 (fildes[1], 1) < 0)
- {
- sys_error (_("command_substitute: cannot duplicate pipe as fd 1"));
- exit (EXECUTION_FAILURE);
- }
-
- /* If standard output is closed in the parent shell
- (such as after `exec >&-'), file descriptor 1 will be
- the lowest available file descriptor, and end up in
- fildes[0]. This can happen for stdin and stderr as well,
- but stdout is more important -- it will cause no output
- to be generated from this command. */
- if ((fildes[1] != fileno (stdin)) &&
- (fildes[1] != fileno (stdout)) &&
- (fildes[1] != fileno (stderr)))
- close (fildes[1]);
-
- if ((fildes[0] != fileno (stdin)) &&
- (fildes[0] != fileno (stdout)) &&
- (fildes[0] != fileno (stderr)))
- close (fildes[0]);
-
-#ifdef __CYGWIN__
- /* Let stdio know the fd may have changed from text to binary mode, and
- make sure to preserve stdout line buffering. */
- freopen (NULL, "w", stdout);
- sh_setlinebuf (stdout);
-#endif /* __CYGWIN__ */
-
- /* The currently executing shell is not interactive. */
- interactive = 0;
-
- /* This is a subshell environment. */
- subshell_environment |= SUBSHELL_COMSUB;
-
- /* When not in POSIX mode, command substitution does not inherit
- the -e flag. */
- if (posixly_correct == 0)
- {
- builtin_ignoring_errexit = 0;
- change_flag ('e', FLAG_OFF);
- set_shellopts ();
- }
-
- remove_quoted_escapes (string);
-
- startup_state = 2; /* see if we can avoid a fork */
- /* Give command substitution a place to jump back to on failure,
- so we don't go back up to main (). */
- result = setjmp_nosigs (top_level);
-
- /* If we're running a command substitution inside a shell function,
- trap `return' so we don't return from the function in the subshell
- and go off to never-never land. */
- if (result == 0 && return_catch_flag)
- function_value = setjmp_nosigs (return_catch);
- else
- function_value = 0;
-
- if (result == ERREXIT)
- rc = last_command_exit_value;
- else if (result == EXITPROG)
- rc = last_command_exit_value;
- else if (result)
- rc = EXECUTION_FAILURE;
- else if (function_value)
- rc = return_catch_value;
- else
- {
- subshell_level++;
- rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST);
- subshell_level--;
- }
-
- last_command_exit_value = rc;
- rc = run_exit_trap ();
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif
- exit (rc);
- }
- else
- {
-#if defined (JOB_CONTROL) && defined (PGRP_PIPE)
- close_pgrp_pipe ();
-#endif /* JOB_CONTROL && PGRP_PIPE */
-
- close (fildes[1]);
-
- tflag = 0;
- istring = read_comsub (fildes[0], quoted, &tflag);
-
- close (fildes[0]);
-
- current_command_subst_pid = pid;
- last_command_exit_value = wait_for (pid);
- last_command_subst_pid = pid;
- last_made_pid = old_pid;
-
-#if defined (JOB_CONTROL)
- /* If last_command_exit_value > 128, then the substituted command
- was terminated by a signal. If that signal was SIGINT, then send
- SIGINT to ourselves. This will break out of loops, for instance. */
- if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT)
- kill (getpid (), SIGINT);
-
- /* wait_for gives the terminal back to shell_pgrp. If some other
- process group should have it, give it away to that group here.
- pipeline_pgrp is non-zero only while we are constructing a
- pipline, so what we are concerned about is whether or not that
- pipeline was started in the background. A pipeline started in
- the background should never get the tty back here. */
- if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0)
- give_terminal_to (pipeline_pgrp, 0);
-#endif /* JOB_CONTROL */
-
- ret = alloc_word_desc ();
- ret->word = istring;
- ret->flags = tflag;
-
- return ret;
- }
-}
-
-/********************************************************
- * *
- * Utility functions for parameter expansion *
- * *
- ********************************************************/
-
-#if defined (ARRAY_VARS)
-
-static arrayind_t
-array_length_reference (s)
- char *s;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *t, c;
- ARRAY *array;
- HASH_TABLE *h;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* If unbound variables should generate an error, report one and return
- failure. */
- if ((var == 0 || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error)
- {
- c = *--t;
- *t = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (s);
- *t = c;
- return (-1);
- }
- else if (var == 0)
- return 0;
-
- /* We support a couple of expansions for variables that are not arrays.
- We'll return the length of the value for v[0], and 1 for v[@] or
- v[*]. Return 0 for everything else. */
-
- array = array_p (var) ? array_cell (var) : (ARRAY *)NULL;
- h = assoc_p (var) ? assoc_cell (var) : (HASH_TABLE *)NULL;
-
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (assoc_p (var))
- return (h ? assoc_num_elements (h) : 0);
- else if (array_p (var))
- return (array ? array_num_elements (array) : 0);
- else
- return (var_isset (var) ? 1 : 0);
- }
-
- if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (t);
- FREE (akey);
- return (-1);
- }
- t = assoc_reference (assoc_cell (var), akey);
- free (akey);
- }
- else
- {
- ind = array_expand_index (var, t, len);
- /* negative subscripts to indexed arrays count back from end */
- if (var && array_p (var) && ind < 0)
- ind = array_max_index (array_cell (var)) + 1 + ind;
- if (ind < 0)
- {
- err_badarraysub (t);
- return (-1);
- }
- if (array_p (var))
- t = array_reference (array, ind);
- else
- t = (ind == 0) ? value_cell (var) : (char *)NULL;
- }
-
- len = MB_STRLEN (t);
- return (len);
-}
-#endif /* ARRAY_VARS */
-
-static int
-valid_brace_expansion_word (name, var_is_special)
- char *name;
- int var_is_special;
-{
- if (DIGIT (*name) && all_digits (name))
- return 1;
- else if (var_is_special)
- return 1;
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- return 1;
-#endif /* ARRAY_VARS */
- else if (legal_identifier (name))
- return 1;
- else
- return 0;
-}
-
-static int
-chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at)
- char *name;
- int quoted;
- int *quoted_dollar_atp, *contains_dollar_at;
-{
- char *temp1;
-
- if (name == 0)
- {
- if (quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
- return 0;
- }
-
- /* check for $@ and $* */
- if (name[0] == '@' && name[1] == 0)
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
- else if (name[0] == '*' && name[1] == '\0' && quoted == 0)
- {
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
-
- /* Now check for ${array[@]} and ${array[*]} */
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- {
- temp1 = mbschr (name, '[');
- if (temp1 && temp1[1] == '@' && temp1[2] == ']')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- } /* [ */
- /* ${array[*]}, when unquoted, should be treated like ${array[@]},
- which should result in separate words even when IFS is unset. */
- if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0)
- {
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
- }
-#endif
- return 0;
-}
-
-/* Parameter expand NAME, and return a new string which is the expansion,
- or NULL if there was no expansion.
- VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in
- the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that
- NAME was found inside of a double-quoted expression. */
-static WORD_DESC *
-parameter_brace_expand_word (name, var_is_special, quoted, pflags, indp)
- char *name;
- int var_is_special, quoted, pflags;
- arrayind_t *indp;
-{
- WORD_DESC *ret;
- char *temp, *tt;
- intmax_t arg_index;
- SHELL_VAR *var;
- int atype, rflags;
- arrayind_t ind;
-
- ret = 0;
- temp = 0;
- rflags = 0;
-
- if (indp)
- *indp = INTMAX_MIN;
-
- /* Handle multiple digit arguments, as in ${11}. */
- if (legal_number (name, &arg_index))
- {
- tt = get_dollar_var_value (arg_index);
- if (tt)
- temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (tt)
- : quote_escapes (tt);
- else
- temp = (char *)NULL;
- FREE (tt);
- }
- else if (var_is_special) /* ${@} */
- {
- int sindex;
- tt = (char *)xmalloc (2 + strlen (name));
- tt[sindex = 0] = '$';
- strcpy (tt + 1, name);
-
- ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL,
- (int *)NULL, (int *)NULL, pflags);
- free (tt);
- }
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- {
-expand_arrayref:
- /* XXX - does this leak if name[@] or name[*]? */
- if (pflags & PF_ASSIGNRHS)
- {
- temp = array_variable_name (name, &tt, (int *)0);
- if (ALL_ELEMENT_SUB (tt[0]) && tt[1] == ']')
- temp = array_value (name, quoted|Q_DOUBLE_QUOTES, 0, &atype, &ind);
- else
- temp = array_value (name, quoted, 0, &atype, &ind);
- }
- else
- temp = array_value (name, quoted, 0, &atype, &ind);
- if (atype == 0 && temp)
- {
- temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (temp)
- : quote_escapes (temp);
- rflags |= W_ARRAYIND;
- if (indp)
- *indp = ind;
- }
- else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- rflags |= W_HASQUOTEDNULL;
- }
-#endif
- else if (var = find_variable (name))
- {
- if (var_isset (var) && invisible_p (var) == 0)
- {
-#if defined (ARRAY_VARS)
- if (assoc_p (var))
- temp = assoc_reference (assoc_cell (var), "0");
- else if (array_p (var))
- temp = array_reference (array_cell (var), 0);
- else
- temp = value_cell (var);
-#else
- temp = value_cell (var);
-#endif
-
- if (temp)
- temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (temp)
- : quote_escapes (temp);
- }
- else
- temp = (char *)NULL;
- }
- else if (var = find_variable_last_nameref (name))
- {
- temp = nameref_cell (var);
-#if defined (ARRAY_VARS)
- /* Handle expanding nameref whose value is x[n] */
- if (temp && *temp && valid_array_reference (temp))
- {
- name = temp;
- goto expand_arrayref;
- }
-#endif
- /* y=2 ; typeset -n x=y; echo ${x} is not the same as echo ${2} in ksh */
- else if (temp && *temp && legal_identifier (temp) == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("%s: invalid variable name for name reference"), temp);
- temp = &expand_param_error;
- }
- else
- temp = (char *)NULL;
- }
- else
- temp = (char *)NULL;
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->word = temp;
- ret->flags |= rflags;
- }
- return ret;
-}
-
-/* Expand an indirect reference to a variable: ${!NAME} expands to the
- value of the variable whose name is the value of NAME. */
-static WORD_DESC *
-parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at)
- char *name;
- int var_is_special, quoted;
- int *quoted_dollar_atp, *contains_dollar_at;
-{
- char *temp, *t;
- WORD_DESC *w;
- SHELL_VAR *v;
-
- /* See if it's a nameref first, behave in ksh93-compatible fashion.
- There is at least one incompatibility: given ${!foo[0]} where foo=bar,
- bash performs an indirect lookup on foo[0] and expands the result;
- ksh93 expands bar[0]. We could do that here -- there are enough usable
- primitives to do that -- but do not at this point. */
- if (var_is_special == 0 && (v = find_variable_last_nameref (name)))
- {
- if (nameref_p (v) && (t = nameref_cell (v)) && *t)
- {
- w = alloc_word_desc ();
- w->word = savestring (t);
- w->flags = 0;
- return w;
- }
- }
-
- /* If var_is_special == 0, and name is not an array reference, this does
- more expansion than necessary. It should really look up the variable's
- value and not try to expand it. */
- w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND, 0);
- t = w->word;
- /* Have to dequote here if necessary */
- if (t)
- {
- temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- ? dequote_string (t)
- : dequote_escapes (t);
- free (t);
- t = temp;
- }
- dispose_word_desc (w);
-
- chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at);
- if (t == 0)
- return (WORD_DESC *)NULL;
-
- w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0, 0);
- free (t);
-
- return w;
-}
-
-/* Expand the right side of a parameter expansion of the form ${NAMEcVALUE},
- depending on the value of C, the separating character. C can be one of
- "-", "+", or "=". QUOTED is true if the entire brace expression occurs
- between double quotes. */
-static WORD_DESC *
-parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat)
- char *name, *value;
- int c, quoted, *qdollaratp, *hasdollarat;
-{
- WORD_DESC *w;
- WORD_LIST *l;
- char *t, *t1, *temp;
- int hasdol;
-
- /* If the entire expression is between double quotes, we want to treat
- the value as a double-quoted string, with the exception that we strip
- embedded unescaped double quotes (for sh backwards compatibility). */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value)
- {
- hasdol = 0;
- temp = string_extract_double_quoted (value, &hasdol, 1);
- }
- else
- temp = value;
-
- w = alloc_word_desc ();
- hasdol = 0;
- /* XXX was 0 not quoted */
- l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL)
- : (WORD_LIST *)0;
- if (hasdollarat)
- *hasdollarat = hasdol || (l && l->next);
- if (temp != value)
- free (temp);
- if (l)
- {
- /* The expansion of TEMP returned something. We need to treat things
- slightly differently if HASDOL is non-zero. If we have "$@", the
- individual words have already been quoted. We need to turn them
- into a string with the words separated by the first character of
- $IFS without any additional quoting, so string_list_dollar_at won't
- do the right thing. We use string_list_dollar_star instead. */
- temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l);
-
- /* If l->next is not null, we know that TEMP contained "$@", since that
- is the only expansion that creates more than one word. */
- if (qdollaratp && ((hasdol && quoted) || l->next))
- *qdollaratp = 1;
- /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is
- a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the
- flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the
- expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- (which is more paranoia than anything else), we need to return the
- quoted null string and set the flags to indicate it. */
- if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp) && QUOTED_NULL (l->word->word) && (l->word->flags & W_HASQUOTEDNULL))
- {
- w->flags |= W_HASQUOTEDNULL;
- }
- dispose_words (l);
- }
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol)
- {
- /* The brace expansion occurred between double quotes and there was
- a $@ in TEMP. It does not matter if the $@ is quoted, as long as
- it does not expand to anything. In this case, we want to return
- a quoted empty string. */
- temp = make_quoted_char ('\0');
- w->flags |= W_HASQUOTEDNULL;
- }
- else
- temp = (char *)NULL;
-
- if (c == '-' || c == '+')
- {
- w->word = temp;
- return w;
- }
-
- /* c == '=' */
- t = temp ? savestring (temp) : savestring ("");
- t1 = dequote_string (t);
- free (t);
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name))
- assign_array_element (name, t1, 0);
- else
-#endif /* ARRAY_VARS */
- bind_variable (name, t1, 0);
-#if 0
- if (STREQ (name, "IFS") == 0)
-#endif
- stupidly_hack_special_variables (name);
-
- /* From Posix group discussion Feb-March 2010. Issue 7 0000221 */
- free (temp);
-
- w->word = t1;
- return w;
-}
-
-/* Deal with the right hand side of a ${name:?value} expansion in the case
- that NAME is null or not set. If VALUE is non-null it is expanded and
- used as the error message to print, otherwise a standard message is
- printed. */
-static void
-parameter_brace_expand_error (name, value)
- char *name, *value;
-{
- WORD_LIST *l;
- char *temp;
-
- last_command_exit_value = EXECUTION_FAILURE; /* ensure it's non-zero */
- if (value && *value)
- {
- l = expand_string (value, 0);
- temp = string_list (l);
- report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */
- FREE (temp);
- dispose_words (l);
- }
- else
- report_error (_("%s: parameter null or not set"), name);
-
- /* Free the data we have allocated during this expansion, since we
- are about to longjmp out. */
- free (name);
- FREE (value);
-}
-
-/* Return 1 if NAME is something for which parameter_brace_expand_length is
- OK to do. */
-static int
-valid_length_expression (name)
- char *name;
-{
- return (name[1] == '\0' || /* ${#} */
- ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */
- (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */
-#if defined (ARRAY_VARS)
- valid_array_reference (name + 1) || /* ${#a[7]} */
-#endif
- legal_identifier (name + 1)); /* ${#PS1} */
-}
-
-/* Handle the parameter brace expansion that requires us to return the
- length of a parameter. */
-static intmax_t
-parameter_brace_expand_length (name)
- char *name;
-{
- char *t, *newname;
- intmax_t number, arg_index;
- WORD_LIST *list;
-#if defined (ARRAY_VARS)
- SHELL_VAR *var;
-#endif
-
- if (name[1] == '\0') /* ${#} */
- number = number_of_args ();
- else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */
- number = number_of_args ();
- else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0')
- {
- /* Take the lengths of some of the shell's special parameters. */
- switch (name[1])
- {
- case '-':
- t = which_set_flags ();
- break;
- case '?':
- t = itos (last_command_exit_value);
- break;
- case '$':
- t = itos (dollar_dollar_pid);
- break;
- case '!':
- if (last_asynchronous_pid == NO_PID)
- t = (char *)NULL; /* XXX - error if set -u set? */
- else
- t = itos (last_asynchronous_pid);
- break;
- case '#':
- t = itos (number_of_args ());
- break;
- }
- number = STRLEN (t);
- FREE (t);
- }
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name + 1))
- number = array_length_reference (name + 1);
-#endif /* ARRAY_VARS */
- else
- {
- number = 0;
-
- if (legal_number (name + 1, &arg_index)) /* ${#1} */
- {
- t = get_dollar_var_value (arg_index);
- if (t == 0 && unbound_vars_is_error)
- return INTMAX_MIN;
- number = MB_STRLEN (t);
- FREE (t);
- }
-#if defined (ARRAY_VARS)
- else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var)))
- {
- if (assoc_p (var))
- t = assoc_reference (assoc_cell (var), "0");
- else
- t = array_reference (array_cell (var), 0);
- if (t == 0 && unbound_vars_is_error)
- return INTMAX_MIN;
- number = MB_STRLEN (t);
- }
-#endif
- else /* ${#PS1} */
- {
- newname = savestring (name);
- newname[0] = '$';
- list = expand_string (newname, Q_DOUBLE_QUOTES);
- t = list ? string_list (list) : (char *)NULL;
- free (newname);
- if (list)
- dispose_words (list);
-
- number = t ? MB_STRLEN (t) : 0;
- FREE (t);
- }
- }
-
- return (number);
-}
-
-/* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression,
- so we do some ad-hoc parsing of an arithmetic expression to find
- the first DELIM, instead of using strchr(3). Two rules:
- 1. If the substring contains a `(', read until closing `)'.
- 2. If the substring contains a `?', read past one `:' for each `?'.
-*/
-
-static char *
-skiparith (substr, delim)
- char *substr;
- int delim;
-{
- size_t sublen;
- int skipcol, pcount, i;
- DECLARE_MBSTATE;
-
- sublen = strlen (substr);
- i = skipcol = pcount = 0;
- while (substr[i])
- {
- /* Balance parens */
- if (substr[i] == LPAREN)
- {
- pcount++;
- i++;
- continue;
- }
- if (substr[i] == RPAREN && pcount)
- {
- pcount--;
- i++;
- continue;
- }
- if (pcount)
- {
- ADVANCE_CHAR (substr, sublen, i);
- continue;
- }
-
- /* Skip one `:' for each `?' */
- if (substr[i] == ':' && skipcol)
- {
- skipcol--;
- i++;
- continue;
- }
- if (substr[i] == delim)
- break;
- if (substr[i] == '?')
- {
- skipcol++;
- i++;
- continue;
- }
- ADVANCE_CHAR (substr, sublen, i);
- }
-
- return (substr + i);
-}
-
-/* Verify and limit the start and end of the desired substring. If
- VTYPE == 0, a regular shell variable is being used; if it is 1,
- then the positional parameters are being used; if it is 2, then
- VALUE is really a pointer to an array variable that should be used.
- Return value is 1 if both values were OK, 0 if there was a problem
- with an invalid expression, or -1 if the values were out of range. */
-static int
-verify_substring_values (v, value, substr, vtype, e1p, e2p)
- SHELL_VAR *v;
- char *value, *substr;
- int vtype;
- intmax_t *e1p, *e2p;
-{
- char *t, *temp1, *temp2;
- arrayind_t len;
- int expok;
-#if defined (ARRAY_VARS)
- ARRAY *a;
- HASH_TABLE *h;
-#endif
-
- /* duplicate behavior of strchr(3) */
- t = skiparith (substr, ':');
- if (*t && *t == ':')
- *t = '\0';
- else
- t = (char *)0;
-
- temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES);
- *e1p = evalexp (temp1, &expok);
- free (temp1);
- if (expok == 0)
- return (0);
-
- len = -1; /* paranoia */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- len = MB_STRLEN (value);
- break;
- case VT_POSPARMS:
- len = number_of_args () + 1;
- if (*e1p == 0)
- len++; /* add one arg if counting from $0 */
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- /* For arrays, the first value deals with array indices. Negative
- offsets count from one past the array's maximum index. Associative
- arrays treat the number of elements as the maximum index. */
- if (assoc_p (v))
- {
- h = assoc_cell (v);
- len = assoc_num_elements (h) + (*e1p < 0);
- }
- else
- {
- a = (ARRAY *)value;
- len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */
- }
- break;
-#endif
- }
-
- if (len == -1) /* paranoia */
- return -1;
-
- if (*e1p < 0) /* negative offsets count from end */
- *e1p += len;
-
- if (*e1p > len || *e1p < 0)
- return (-1);
-
-#if defined (ARRAY_VARS)
- /* For arrays, the second offset deals with the number of elements. */
- if (vtype == VT_ARRAYVAR)
- len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a);
-#endif
-
- if (t)
- {
- t++;
- temp2 = savestring (t);
- temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES);
- free (temp2);
- t[-1] = ':';
- *e2p = evalexp (temp1, &expok);
- free (temp1);
- if (expok == 0)
- return (0);
-#if 1
- if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0)
-#else
- /* bash-4.3: allow positional parameter length < 0 to count backwards
- from end of positional parameters */
- if (vtype == VT_ARRAYVAR && *e2p < 0)
-#endif
- {
- internal_error (_("%s: substring expression < 0"), t);
- return (0);
- }
-#if defined (ARRAY_VARS)
- /* In order to deal with sparse arrays, push the intelligence about how
- to deal with the number of elements desired down to the array-
- specific functions. */
- if (vtype != VT_ARRAYVAR)
-#endif
- {
- if (*e2p < 0)
- {
- *e2p += len;
- if (*e2p < 0 || *e2p < *e1p)
- {
- internal_error (_("%s: substring expression < 0"), t);
- return (0);
- }
- }
- else
- *e2p += *e1p; /* want E2 chars starting at E1 */
- if (*e2p > len)
- *e2p = len;
- }
- }
- else
- *e2p = len;
-
- return (1);
-}
-
-/* Return the type of variable specified by VARNAME (simple variable,
- positional param, or array variable). Also return the value specified
- by VARNAME (value of a variable or a reference to an array element).
- QUOTED is the standard description of quoting state, using Q_* defines.
- FLAGS is currently a set of flags to pass to array_value. If IND is
- non-null and not INTMAX_MIN, and FLAGS includes AV_USEIND, IND is
- passed to array_value so the array index is not computed again.
- If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL
- characters in the value are quoted with CTLESC and takes appropriate
- steps. For convenience, *VALP is set to the dequoted VALUE. */
-static int
-get_var_and_type (varname, value, ind, quoted, flags, varp, valp)
- char *varname, *value;
- arrayind_t ind;
- int quoted, flags;
- SHELL_VAR **varp;
- char **valp;
-{
- int vtype;
- char *temp;
-#if defined (ARRAY_VARS)
- SHELL_VAR *v;
-#endif
- arrayind_t lind;
-
- /* This sets vtype to VT_VARIABLE or VT_POSPARMS */
- vtype = (varname[0] == '@' || varname[0] == '*') && varname[1] == '\0';
- if (vtype == VT_POSPARMS && varname[0] == '*')
- vtype |= VT_STARSUB;
- *varp = (SHELL_VAR *)NULL;
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (varname))
- {
- v = array_variable_part (varname, &temp, (int *)0);
- /* If we want to signal array_value to use an already-computed index,
- set LIND to that index */
- lind = (ind != INTMAX_MIN && (flags & AV_USEIND)) ? ind : 0;
- if (v && (array_p (v) || assoc_p (v)))
- { /* [ */
- if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')
- {
- /* Callers have to differentiate betwen indexed and associative */
- vtype = VT_ARRAYVAR;
- if (temp[0] == '*')
- vtype |= VT_STARSUB;
- *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v);
- }
- else
- {
- vtype = VT_ARRAYMEMBER;
- *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
- }
- *varp = v;
- }
- else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']'))
- {
- vtype = VT_VARIABLE;
- *varp = v;
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
- else
- *valp = dequote_escapes (value);
- }
- else
- {
- vtype = VT_ARRAYMEMBER;
- *varp = v;
- *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
- }
- }
- else if ((v = find_variable (varname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v)))
- {
- vtype = VT_ARRAYMEMBER;
- *varp = v;
- *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0);
- }
- else
-#endif
- {
- if (value && vtype == VT_VARIABLE)
- {
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
- else
- *valp = dequote_escapes (value);
- }
- else
- *valp = value;
- }
-
- return vtype;
-}
-
-/******************************************************/
-/* */
-/* Functions to extract substrings of variable values */
-/* */
-/******************************************************/
-
-#if defined (HANDLE_MULTIBYTE)
-/* Character-oriented rather than strictly byte-oriented substrings. S and
- E, rather being strict indices into STRING, indicate character (possibly
- multibyte character) positions that require calculation.
- Used by the ${param:offset[:length]} expansion. */
-static char *
-mb_substring (string, s, e)
- char *string;
- int s, e;
-{
- char *tt;
- int start, stop, i, slen;
- DECLARE_MBSTATE;
-
- start = 0;
- /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0;
-
- i = s;
- while (string[start] && i--)
- ADVANCE_CHAR (string, slen, start);
- stop = start;
- i = e - s;
- while (string[stop] && i--)
- ADVANCE_CHAR (string, slen, stop);
- tt = substring (string, start, stop);
- return tt;
-}
-#endif
-
-/* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME
- is `@', use the positional parameters; otherwise, use the value of
- VARNAME. If VARNAME is an array variable, use the array elements. */
-
-static char *
-parameter_brace_substring (varname, value, ind, substr, quoted, flags)
- char *varname, *value;
- int ind;
- char *substr;
- int quoted, flags;
-{
- intmax_t e1, e2;
- int vtype, r, starsub;
- char *temp, *val, *tt, *oname;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- oname = this_command_name;
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- {
- this_command_name = oname;
- return ((char *)NULL);
- }
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- r = verify_substring_values (v, val, substr, vtype, &e1, &e2);
- this_command_name = oname;
- if (r <= 0)
- {
- if (vtype == VT_VARIABLE)
- FREE (val);
- return ((r == 0) ? &expand_param_error : (char *)NULL);
- }
-
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- tt = mb_substring (val, e1, e2);
- else
-#endif
- tt = substring (val, e1, e2);
-
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- temp = quote_string (tt);
- else
- temp = tt ? quote_escapes (tt) : (char *)NULL;
- FREE (tt);
- break;
- case VT_POSPARMS:
- tt = pos_params (varname, e1, e2, quoted);
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
- {
- temp = tt ? quote_escapes (tt) : (char *)NULL;
- FREE (tt);
- }
- else
- temp = tt;
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- if (assoc_p (v))
- /* we convert to list and take first e2 elements starting at e1th
- element -- officially undefined for now */
- temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted);
- else
- /* We want E2 to be the number of elements desired (arrays can be sparse,
- so verify_substring_values just returns the numbers specified and we
- rely on array_subrange to understand how to deal with them). */
- temp = array_subrange (array_cell (v), e1, e2, starsub, quoted);
- /* array_subrange now calls array_quote_escapes as appropriate, so the
- caller no longer needs to. */
- break;
-#endif
- default:
- temp = (char *)NULL;
- }
-
- return temp;
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform pattern substitution on variable values */
-/* */
-/****************************************************************/
-
-static int
-shouldexp_replacement (s)
- char *s;
-{
- register char *p;
-
- for (p = s; p && *p; p++)
- {
- if (*p == '\\')
- p++;
- else if (*p == '&')
- return 1;
- }
- return 0;
-}
-
-char *
-pat_subst (string, pat, rep, mflags)
- char *string, *pat, *rep;
- int mflags;
-{
- char *ret, *s, *e, *str, *rstr, *mstr;
- int rsize, rptr, l, replen, mtype, rxpand, rslen, mlen;
-
- if (string == 0)
- return (savestring (""));
-
- mtype = mflags & MATCH_TYPEMASK;
-
-#if 0 /* bash-4.2 ? */
- rxpand = (rep && *rep) ? shouldexp_replacement (rep) : 0;
-#else
- rxpand = 0;
-#endif
-
- /* Special cases:
- * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING
- * with REP and return the result.
- * 2. A null pattern with mtype == MATCH_END means to append REP to
- * STRING and return the result.
- * These don't understand or process `&' in the replacement string.
- */
- if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END))
- {
- replen = STRLEN (rep);
- l = STRLEN (string);
- ret = (char *)xmalloc (replen + l + 2);
- if (replen == 0)
- strcpy (ret, string);
- else if (mtype == MATCH_BEG)
- {
- strcpy (ret, rep);
- strcpy (ret + replen, string);
- }
- else
- {
- strcpy (ret, string);
- strcpy (ret + l, rep);
- }
- return (ret);
- }
-
- ret = (char *)xmalloc (rsize = 64);
- ret[0] = '\0';
-
- for (replen = STRLEN (rep), rptr = 0, str = string;;)
- {
- if (match_pattern (str, pat, mtype, &s, &e) == 0)
- break;
- l = s - str;
-
- if (rxpand)
- {
- int x;
- mlen = e - s;
- mstr = xmalloc (mlen + 1);
- for (x = 0; x < mlen; x++)
- mstr[x] = s[x];
- mstr[mlen] = '\0';
- rstr = strcreplace (rep, '&', mstr, 0);
- rslen = strlen (rstr);
- }
- else
- {
- rstr = rep;
- rslen = replen;
- }
-
- RESIZE_MALLOCED_BUFFER (ret, rptr, (l + rslen), rsize, 64);
-
- /* OK, now copy the leading unmatched portion of the string (from
- str to s) to ret starting at rptr (the current offset). Then copy
- the replacement string at ret + rptr + (s - str). Increment
- rptr (if necessary) and str and go on. */
- if (l)
- {
- strncpy (ret + rptr, str, l);
- rptr += l;
- }
- if (replen)
- {
- strncpy (ret + rptr, rstr, rslen);
- rptr += rslen;
- }
- str = e; /* e == end of match */
-
- if (rstr != rep)
- free (rstr);
-
- if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY)
- break;
-
- if (s == e)
- {
- /* On a zero-length match, make sure we copy one character, since
- we increment one character to avoid infinite recursion. */
- RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64);
- ret[rptr++] = *str++;
- e++; /* avoid infinite recursion on zero-length match */
- }
- }
-
- /* Now copy the unmatched portion of the input string */
- if (str && *str)
- {
- RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64);
- strcpy (ret + rptr, str);
- }
- else
- ret[rptr] = '\0';
-
- return ret;
-}
-
-/* Do pattern match and replacement on the positional parameters. */
-static char *
-pos_params_pat_subst (string, pat, rep, mflags)
- char *string, *pat, *rep;
- int mflags;
-{
- WORD_LIST *save, *params;
- WORD_DESC *w;
- char *ret;
- int pchar, qflags;
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- for ( ; params; params = params->next)
- {
- ret = pat_subst (params->word->word, pat, rep, mflags);
- w = alloc_word_desc ();
- w->word = ret ? ret : savestring ("");
- dispose_word (params->word);
- params->word = w;
- }
-
- pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@';
- qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0;
-
- ret = string_list_pos_params (pchar, save, qflags);
-
- dispose_words (save);
-
- return (ret);
-}
-
-/* Perform pattern substitution on VALUE, which is the expansion of
- VARNAME. PATSUB is an expression supplying the pattern to match
- and the string to substitute. QUOTED is a flags word containing
- the type of quoting currently in effect. */
-static char *
-parameter_brace_patsub (varname, value, ind, patsub, quoted, flags)
- char *varname, *value;
- int ind;
- char *patsub;
- int quoted, flags;
-{
- int vtype, mflags, starsub, delim;
- char *val, *temp, *pat, *rep, *p, *lpatsub, *tt;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- mflags = 0;
- /* PATSUB is never NULL when this is called. */
- if (*patsub == '/')
- {
- mflags |= MATCH_GLOBREP;
- patsub++;
- }
-
- /* Malloc this because expand_string_if_necessary or one of the expansion
- functions in its call chain may free it on a substitution error. */
- lpatsub = savestring (patsub);
-
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- mflags |= MATCH_QUOTED;
-
- if (starsub)
- mflags |= MATCH_STARSUB;
-
- /* If the pattern starts with a `/', make sure we skip over it when looking
- for the replacement delimiter. */
- delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0);
- if (lpatsub[delim] == '/')
- {
- lpatsub[delim] = 0;
- rep = lpatsub + delim + 1;
- }
- else
- rep = (char *)NULL;
-
- if (rep && *rep == '\0')
- rep = (char *)NULL;
-
- /* Perform the same expansions on the pattern as performed by the
- pattern removal expansions. */
- pat = getpattern (lpatsub, quoted, 1);
-
- if (rep)
- {
- /* We want to perform quote removal on the expanded replacement even if
- the entire expansion is double-quoted because the parser and string
- extraction functions treated quotes in the replacement string as
- special. THIS IS NOT BACKWARDS COMPATIBLE WITH BASH-4.2. */
- if (shell_compatibility_level > 42)
- rep = expand_string_if_necessary (rep, quoted & ~(Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT), expand_string_unsplit);
- /* This is the bash-4.2 code. */
- else if ((mflags & MATCH_QUOTED) == 0)
- rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit);
- else
- rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit);
- }
-
- /* ksh93 doesn't allow the match specifier to be a part of the expanded
- pattern. This is an extension. Make sure we don't anchor the pattern
- at the beginning or end of the string if we're doing global replacement,
- though. */
- p = pat;
- if (mflags & MATCH_GLOBREP)
- mflags |= MATCH_ANY;
- else if (pat && pat[0] == '#')
- {
- mflags |= MATCH_BEG;
- p++;
- }
- else if (pat && pat[0] == '%')
- {
- mflags |= MATCH_END;
- p++;
- }
- else
- mflags |= MATCH_ANY;
-
- /* OK, we now want to substitute REP for PAT in VAL. If
- flags & MATCH_GLOBREP is non-zero, the substitution is done
- everywhere, otherwise only the first occurrence of PAT is
- replaced. The pattern matching code doesn't understand
- CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable
- values passed in (VT_VARIABLE) so the pattern substitution
- code works right. We need to requote special chars after
- we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the
- other cases if QUOTED == 0, since the posparams and arrays
- indexed by * or @ do special things when QUOTED != 0. */
-
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp = pat_subst (val, p, rep, mflags);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp)
- {
- tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
- case VT_POSPARMS:
- temp = pos_params_pat_subst (val, p, rep, mflags);
- if (temp && (mflags & MATCH_QUOTED) == 0)
- {
- tt = quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags)
- : array_patsub (array_cell (v), p, rep, mflags);
- /* Don't call quote_escapes anymore; array_patsub calls
- array_quote_escapes as appropriate before adding the
- space separators; ditto for assoc_patsub. */
- break;
-#endif
- }
-
- FREE (pat);
- FREE (rep);
- free (lpatsub);
-
- return temp;
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform case modification on variable values */
-/* */
-/****************************************************************/
-
-/* Do case modification on the positional parameters. */
-
-static char *
-pos_params_modcase (string, pat, modop, mflags)
- char *string, *pat;
- int modop;
- int mflags;
-{
- WORD_LIST *save, *params;
- WORD_DESC *w;
- char *ret;
- int pchar, qflags;
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- for ( ; params; params = params->next)
- {
- ret = sh_modcase (params->word->word, pat, modop);
- w = alloc_word_desc ();
- w->word = ret ? ret : savestring ("");
- dispose_word (params->word);
- params->word = w;
- }
-
- pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@';
- qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0;
-
- ret = string_list_pos_params (pchar, save, qflags);
- dispose_words (save);
-
- return (ret);
-}
-
-/* Perform case modification on VALUE, which is the expansion of
- VARNAME. MODSPEC is an expression supplying the type of modification
- to perform. QUOTED is a flags word containing the type of quoting
- currently in effect. */
-static char *
-parameter_brace_casemod (varname, value, ind, modspec, patspec, quoted, flags)
- char *varname, *value;
- int ind, modspec;
- char *patspec;
- int quoted, flags;
-{
- int vtype, starsub, modop, mflags, x;
- char *val, *temp, *pat, *p, *lpat, *tt;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- modop = 0;
- mflags = 0;
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- mflags |= MATCH_QUOTED;
- if (starsub)
- mflags |= MATCH_STARSUB;
-
- p = patspec;
- if (modspec == '^')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_UPPER : CASE_UPFIRST;
- p += x;
- }
- else if (modspec == ',')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_LOWER : CASE_LOWFIRST;
- p += x;
- }
- else if (modspec == '~')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_TOGGLEALL : CASE_TOGGLE;
- p += x;
- }
-
- lpat = p ? savestring (p) : 0;
- /* Perform the same expansions on the pattern as performed by the
- pattern removal expansions. FOR LATER */
- pat = lpat ? getpattern (lpat, quoted, 1) : 0;
-
- /* OK, now we do the case modification. */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp = sh_modcase (val, pat, modop);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp)
- {
- tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-
- case VT_POSPARMS:
- temp = pos_params_modcase (val, pat, modop, mflags);
- if (temp && (mflags & MATCH_QUOTED) == 0)
- {
- tt = quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags)
- : array_modcase (array_cell (v), pat, modop, mflags);
- /* Don't call quote_escapes; array_modcase calls array_quote_escapes
- as appropriate before adding the space separators; ditto for
- assoc_modcase. */
- break;
-#endif
- }
-
- FREE (pat);
- free (lpat);
-
- return temp;
-}
-
-/* Check for unbalanced parens in S, which is the contents of $(( ... )). If
- any occur, this must be a nested command substitution, so return 0.
- Otherwise, return 1. A valid arithmetic expression must always have a
- ( before a matching ), so any cases where there are more right parens
- means that this must not be an arithmetic expression, though the parser
- will not accept it without a balanced total number of parens. */
-static int
-chk_arithsub (s, len)
- const char *s;
- int len;
-{
- int i, count;
- DECLARE_MBSTATE;
-
- i = count = 0;
- while (i < len)
- {
- if (s[i] == LPAREN)
- count++;
- else if (s[i] == RPAREN)
- {
- count--;
- if (count < 0)
- return 0;
- }
-
- switch (s[i])
- {
- default:
- ADVANCE_CHAR (s, len, i);
- break;
-
- case '\\':
- i++;
- if (s[i])
- ADVANCE_CHAR (s, len, i);
- break;
-
- case '\'':
- i = skip_single_quoted (s, len, ++i);
- break;
-
- case '"':
- i = skip_double_quoted ((char *)s, len, ++i);
- break;
- }
- }
-
- return (count == 0);
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform parameter expansion on a string */
-/* */
-/****************************************************************/
-
-/* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */
-static WORD_DESC *
-parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at)
- char *string;
- int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags;
-{
- int check_nullness, var_is_set, var_is_null, var_is_special;
- int want_substring, want_indir, want_patsub, want_casemod;
- char *name, *value, *temp, *temp1;
- WORD_DESC *tdesc, *ret;
- int t_index, sindex, c, tflag, modspec;
- intmax_t number;
- arrayind_t ind;
-
- temp = temp1 = value = (char *)NULL;
- var_is_set = var_is_null = var_is_special = check_nullness = 0;
- want_substring = want_indir = want_patsub = want_casemod = 0;
-
- sindex = *indexp;
- t_index = ++sindex;
- /* ${#var} doesn't have any of the other parameter expansions on it. */
- if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */
- name = string_extract (string, &t_index, "}", SX_VARNAME);
- else
-#if defined (CASEMOD_EXPANSIONS)
- /* To enable case-toggling expansions using the `~' operator character
- change the 1 to 0. */
-# if defined (CASEMOD_CAPCASE)
- name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME);
-# else
- name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME);
-# endif /* CASEMOD_CAPCASE */
-#else
- name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME);
-#endif /* CASEMOD_EXPANSIONS */
-
- ret = 0;
- tflag = 0;
-
- ind = INTMAX_MIN;
-
- /* If the name really consists of a special variable, then make sure
- that we have the entire name. We don't allow indirect references
- to special variables except `#', `?', `@' and `*'. */
- if ((sindex == t_index && VALID_SPECIAL_LENGTH_PARAM (string[t_index])) ||
- (sindex == t_index - 1 && string[sindex] == '!' && VALID_INDIR_PARAM (string[t_index])))
- {
- t_index++;
- temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0);
- name = (char *)xrealloc (name, 3 + (strlen (temp1)));
- *name = string[sindex];
- if (string[sindex] == '!')
- {
- /* indirect reference of $#, $?, $@, or $* */
- name[1] = string[sindex + 1];
- strcpy (name + 2, temp1);
- }
- else
- strcpy (name + 1, temp1);
- free (temp1);
- }
- sindex = t_index;
-
- /* Find out what character ended the variable name. Then
- do the appropriate thing. */
- if (c = string[sindex])
- sindex++;
-
- /* If c is followed by one of the valid parameter expansion
- characters, move past it as normal. If not, assume that
- a substring specification is being given, and do not move
- past it. */
- if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex]))
- {
- check_nullness++;
- if (c = string[sindex])
- sindex++;
- }
- else if (c == ':' && string[sindex] != RBRACE)
- want_substring = 1;
- else if (c == '/' /* && string[sindex] != RBRACE */) /* XXX */
- want_patsub = 1;
-#if defined (CASEMOD_EXPANSIONS)
- else if (c == '^' || c == ',' || c == '~')
- {
- modspec = c;
- want_casemod = 1;
- }
-#endif
-
- /* Catch the valid and invalid brace expressions that made it through the
- tests above. */
- /* ${#-} is a valid expansion and means to take the length of $-.
- Similarly for ${#?} and ${##}... */
- if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 &&
- VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE)
- {
- name = (char *)xrealloc (name, 3);
- name[1] = c;
- name[2] = '\0';
- c = string[sindex++];
- }
-
- /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */
- if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 &&
- member (c, "%:=+/") && string[sindex] == RBRACE)
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- /* Indirect expansion begins with a `!'. A valid indirect expansion is
- either a variable name, one of the positional parameters or a special
- variable that expands to one of the positional parameters. */
- want_indir = *name == '!' &&
- (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1])
- || VALID_INDIR_PARAM (name[1]));
-
- /* Determine the value of this variable. */
-
- /* Check for special variables, directly referenced. */
- if (SPECIAL_VAR (name, want_indir))
- var_is_special++;
-
- /* Check for special expansion things, like the length of a parameter */
- if (*name == '#' && name[1])
- {
- /* If we are not pointing at the character just after the
- closing brace, then we haven't gotten all of the name.
- Since it begins with a special character, this is a bad
- substitution. Also check NAME for validity before trying
- to go on. */
- if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0))
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- number = parameter_brace_expand_length (name);
- if (number == INTMAX_MIN && unbound_vars_is_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (name+1);
- free (name);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- free (name);
-
- *indexp = sindex;
- if (number < 0)
- return (&expand_wdesc_error);
- else
- {
- ret = alloc_word_desc ();
- ret->word = itos (number);
- return ret;
- }
- }
-
- /* ${@} is identical to $@. */
- if (name[0] == '@' && name[1] == '\0')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
-
- if (contains_dollar_at)
- *contains_dollar_at = 1;
-
- tflag |= W_DOLLARAT;
- }
-
- /* Process ${!PREFIX*} expansion. */
- if (want_indir && string[sindex - 1] == RBRACE &&
- (string[sindex - 2] == '*' || string[sindex - 2] == '@') &&
- legal_variable_starter ((unsigned char) name[1]))
- {
- char **x;
- WORD_LIST *xlist;
-
- temp1 = savestring (name + 1);
- number = strlen (temp1);
- temp1[number - 1] = '\0';
- x = all_variables_matching_prefix (temp1);
- xlist = strvec_to_word_list (x, 0, 0);
- if (string[sindex - 2] == '*')
- temp = string_list_dollar_star (xlist);
- else
- {
- temp = string_list_dollar_at (xlist, quoted);
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
-
- tflag |= W_DOLLARAT;
- }
- free (x);
- dispose_words (xlist);
- free (temp1);
- *indexp = sindex;
-
- free (name);
-
- ret = alloc_word_desc ();
- ret->word = temp;
- ret->flags = tflag; /* XXX */
- return ret;
- }
-
-#if defined (ARRAY_VARS)
- /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */
- if (want_indir && string[sindex - 1] == RBRACE &&
- string[sindex - 2] == ']' && valid_array_reference (name+1))
- {
- char *x, *x1;
-
- temp1 = savestring (name + 1);
- x = array_variable_name (temp1, &x1, (int *)0); /* [ */
- FREE (x);
- if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']')
- {
- temp = array_keys (temp1, quoted); /* handles assoc vars too */
- if (x1[0] == '@')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
-
- tflag |= W_DOLLARAT;
- }
-
- free (temp1);
- *indexp = sindex;
-
- ret = alloc_word_desc ();
- ret->word = temp;
- ret->flags = tflag; /* XXX */
- return ret;
- }
-
- free (temp1);
- }
-#endif /* ARRAY_VARS */
-
- /* Make sure that NAME is valid before trying to go on. */
- if (valid_brace_expansion_word (want_indir ? name + 1 : name,
- var_is_special) == 0)
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- if (want_indir)
- tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at);
- else
- tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&(PF_NOSPLIT2|PF_ASSIGNRHS)), &ind);
-
- if (tdesc)
- {
- temp = tdesc->word;
- tflag = tdesc->flags;
- dispose_word_desc (tdesc);
- }
- else
- temp = (char *)0;
-
- if (temp == &expand_param_error || temp == &expand_param_fatal)
- {
- FREE (name);
- FREE (value);
- return (temp == &expand_param_error ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name))
- chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at);
-#endif
-
- var_is_set = temp != (char *)0;
- var_is_null = check_nullness && (var_is_set == 0 || *temp == 0);
- /* XXX - this may not need to be restricted to special variables */
- if (check_nullness)
- var_is_null |= var_is_set && var_is_special && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp);
-
- /* Get the rest of the stuff inside the braces. */
- if (c && c != RBRACE)
- {
- /* Extract the contents of the ${ ... } expansion
- according to the Posix.2 rules. */
- value = extract_dollar_brace_string (string, &sindex, quoted, (c == '%' || c == '#' || c =='/' || c == '^' || c == ',' || c ==':') ? SX_POSIXEXP|SX_WORD : SX_WORD);
- if (string[sindex] == RBRACE)
- sindex++;
- else
- goto bad_substitution;
- }
- else
- value = (char *)NULL;
-
- *indexp = sindex;
-
- /* All the cases where an expansion can possibly generate an unbound
- variable error. */
- if (want_substring || want_patsub || want_casemod || c == '#' || c == '%' || c == RBRACE)
- {
- if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1]))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (name);
- FREE (value);
- FREE (temp);
- free (name);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- }
-
- /* If this is a substring spec, process it and add the result. */
- if (want_substring)
- {
- temp1 = parameter_brace_substring (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
- else if (want_patsub)
- {
- temp1 = parameter_brace_patsub (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
-#if defined (CASEMOD_EXPANSIONS)
- else if (want_casemod)
- {
- temp1 = parameter_brace_casemod (name, temp, ind, modspec, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
-#endif
-
- /* Do the right thing based on which character ended the variable name. */
- switch (c)
- {
- default:
- case '\0':
- bad_substitution:
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("%s: bad substitution"), string ? string : "??");
- FREE (value);
- FREE (temp);
- free (name);
- return &expand_wdesc_error;
-
- case RBRACE:
- break;
-
- case '#': /* ${param#[#]pattern} */
- case '%': /* ${param%[%]pattern} */
- if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0')
- {
- FREE (value);
- break;
- }
- temp1 = parameter_brace_remove_pattern (name, temp, ind, value, c, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- free (temp);
- free (value);
- free (name);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
-
- case '-':
- case '=':
- case '?':
- case '+':
- if (var_is_set && var_is_null == 0)
- {
- /* If the operator is `+', we don't want the value of the named
- variable for anything, just the value of the right hand side. */
- if (c == '+')
- {
- /* XXX -- if we're double-quoted and the named variable is "$@",
- we want to turn off any special handling of "$@" --
- we're not using it, so whatever is on the rhs applies. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- FREE (temp);
- if (value)
- {
- /* From Posix discussion on austin-group list. Issue 221
- requires that backslashes escaping `}' inside
- double-quoted ${...} be removed. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- quoted |= Q_DOLBRACE;
- ret = parameter_brace_expand_rhs (name, value, c,
- quoted,
- quoted_dollar_atp,
- contains_dollar_at);
- /* XXX - fix up later, esp. noting presence of
- W_HASQUOTEDNULL in ret->flags */
- free (value);
- }
- else
- temp = (char *)NULL;
- }
- else
- {
- FREE (value);
- }
- /* Otherwise do nothing; just use the value in TEMP. */
- }
- else /* VAR not set or VAR is NULL. */
- {
- FREE (temp);
- temp = (char *)NULL;
- if (c == '=' && var_is_special)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("$%s: cannot assign in this way"), name);
- free (name);
- free (value);
- return &expand_wdesc_error;
- }
- else if (c == '?')
- {
- parameter_brace_expand_error (name, value);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- else if (c != '+')
- {
- /* XXX -- if we're double-quoted and the named variable is "$@",
- we want to turn off any special handling of "$@" --
- we're not using it, so whatever is on the rhs applies. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- /* From Posix discussion on austin-group list. Issue 221 requires
- that backslashes escaping `}' inside double-quoted ${...} be
- removed. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- quoted |= Q_DOLBRACE;
- ret = parameter_brace_expand_rhs (name, value, c, quoted,
- quoted_dollar_atp,
- contains_dollar_at);
- /* XXX - fix up later, esp. noting presence of
- W_HASQUOTEDNULL in tdesc->flags */
- }
- free (value);
- }
-
- break;
- }
- free (name);
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->flags = tflag;
- ret->word = temp;
- }
- return (ret);
-}
-
-/* Expand a single ${xxx} expansion. The braces are optional. When
- the braces are used, parameter_brace_expand() does the work,
- possibly calling param_expand recursively. */
-static WORD_DESC *
-param_expand (string, sindex, quoted, expanded_something,
- contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p,
- pflags)
- char *string;
- int *sindex, quoted, *expanded_something, *contains_dollar_at;
- int *quoted_dollar_at_p, *had_quoted_null_p, pflags;
-{
- char *temp, *temp1, uerror[3];
- int zindex, t_index, expok;
- unsigned char c;
- intmax_t number;
- SHELL_VAR *var;
- WORD_LIST *list;
- WORD_DESC *tdesc, *ret;
- int tflag;
-
- zindex = *sindex;
- c = string[++zindex];
-
- temp = (char *)NULL;
- ret = tdesc = (WORD_DESC *)NULL;
- tflag = 0;
-
- /* Do simple cases first. Switch on what follows '$'. */
- switch (c)
- {
- /* $0 .. $9? */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- temp1 = dollar_vars[TODIGIT (c)];
- if (unbound_vars_is_error && temp1 == (char *)NULL)
- {
- uerror[0] = '$';
- uerror[1] = c;
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- if (temp1)
- temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp1)
- : quote_escapes (temp1);
- else
- temp = (char *)NULL;
-
- break;
-
- /* $$ -- pid of the invoking shell. */
- case '$':
- temp = itos (dollar_dollar_pid);
- break;
-
- /* $# -- number of positional parameters. */
- case '#':
- temp = itos (number_of_args ());
- break;
-
- /* $? -- return value of the last synchronous command. */
- case '?':
- temp = itos (last_command_exit_value);
- break;
-
- /* $- -- flags supplied to the shell on invocation or by `set'. */
- case '-':
- temp = which_set_flags ();
- break;
-
- /* $! -- Pid of the last asynchronous command. */
- case '!':
- /* If no asynchronous pids have been created, expand to nothing.
- If `set -u' has been executed, and no async processes have
- been created, this is an expansion error. */
- if (last_asynchronous_pid == NO_PID)
- {
- if (expanded_something)
- *expanded_something = 0;
- temp = (char *)NULL;
- if (unbound_vars_is_error)
- {
- uerror[0] = '$';
- uerror[1] = c;
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- }
- else
- temp = itos (last_asynchronous_pid);
- break;
-
- /* The only difference between this and $@ is when the arg is quoted. */
- case '*': /* `$*' */
- list = list_rest_of_args ();
-
-#if 0
- /* According to austin-group posix proposal by Geoff Clare in
- <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
-
- "The shell shall write a message to standard error and
- immediately exit when it tries to expand an unset parameter
- other than the '@' and '*' special parameters."
- */
-
- if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
- {
- uerror[0] = '$';
- uerror[1] = '*';
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-#endif
-
- /* If there are no command-line arguments, this should just
- disappear if there are other characters in the expansion,
- even if it's quoted. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0)
- temp = (char *)NULL;
- else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE))
- {
- /* If we have "$*" we want to make a string of the positional
- parameters, separated by the first character of $IFS, and
- quote the whole string, including the separators. If IFS
- is unset, the parameters are separated by ' '; if $IFS is
- null, the parameters are concatenated. */
- temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list);
- if (temp)
- {
- temp1 = quote_string (temp);
- if (*temp == 0)
- tflag |= W_HASQUOTEDNULL;
- free (temp);
- temp = temp1;
- }
- }
- else
- {
- /* We check whether or not we're eventually going to split $* here,
- for example when IFS is empty and we are processing the rhs of
- an assignment statement. In that case, we don't separate the
- arguments at all. Otherwise, if the $* is not quoted it is
- identical to $@ */
-# if defined (HANDLE_MULTIBYTE)
- if (expand_no_split_dollar_star && ifs_firstc[0] == 0)
-# else
- if (expand_no_split_dollar_star && ifs_firstc == 0)
-# endif
- temp = string_list_dollar_star (list);
- else
- {
- temp = string_list_dollar_at (list, quoted);
- if (quoted == 0 && (ifs_is_set == 0 || ifs_is_null))
- tflag |= W_SPLITSPACE;
- }
-
- if (expand_no_split_dollar_star == 0 && contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- dispose_words (list);
- break;
-
- /* When we have "$@" what we want is "$1" "$2" "$3" ... This
- means that we have to turn quoting off after we split into
- the individually quoted arguments so that the final split
- on the first character of $IFS is still done. */
- case '@': /* `$@' */
- list = list_rest_of_args ();
-
-#if 0
- /* According to austin-group posix proposal by Geoff Clare in
- <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
-
- "The shell shall write a message to standard error and
- immediately exit when it tries to expand an unset parameter
- other than the '@' and '*' special parameters."
- */
-
- if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
- {
- uerror[0] = '$';
- uerror[1] = '@';
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-#endif
-
- /* We want to flag the fact that we saw this. We can't turn
- off quoting entirely, because other characters in the
- string might need it (consider "\"$@\""), but we need some
- way to signal that the final split on the first character
- of $IFS should be done, even though QUOTED is 1. */
- /* XXX - should this test include Q_PATQUOTE? */
- if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- *quoted_dollar_at_p = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
-
- /* We want to separate the positional parameters with the first
- character of $IFS in case $IFS is something other than a space.
- We also want to make sure that splitting is done no matter what --
- according to POSIX.2, this expands to a list of the positional
- parameters no matter what IFS is set to. */
- temp = string_list_dollar_at (list, (pflags & PF_ASSIGNRHS) ? (quoted|Q_DOUBLE_QUOTES) : quoted);
-
- tflag |= W_DOLLARAT;
- dispose_words (list);
- break;
-
- case LBRACE:
- tdesc = parameter_brace_expand (string, &zindex, quoted, pflags,
- quoted_dollar_at_p,
- contains_dollar_at);
-
- if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal)
- return (tdesc);
- temp = tdesc ? tdesc->word : (char *)0;
-
- /* XXX */
- /* Quoted nulls should be removed if there is anything else
- in the string. */
- /* Note that we saw the quoted null so we can add one back at
- the end of this function if there are no other characters
- in the string, discard TEMP, and go on. The exception to
- this is when we have "${@}" and $1 is '', since $@ needs
- special handling. */
- if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp))
- {
- if (had_quoted_null_p)
- *had_quoted_null_p = 1;
- if (*quoted_dollar_at_p == 0)
- {
- free (temp);
- tdesc->word = temp = (char *)NULL;
- }
-
- }
-
- ret = tdesc;
- goto return0;
-
- /* Do command or arithmetic substitution. */
- case LPAREN:
- /* We have to extract the contents of this paren substitution. */
- t_index = zindex + 1;
- temp = extract_command_subst (string, &t_index, 0);
- zindex = t_index;
-
- /* For Posix.2-style `$(( ))' arithmetic substitution,
- extract the expression and pass it to the evaluator. */
- if (temp && *temp == LPAREN)
- {
- char *temp2;
- temp1 = temp + 1;
- temp2 = savestring (temp1);
- t_index = strlen (temp2) - 1;
-
- if (temp2[t_index] != RPAREN)
- {
- free (temp2);
- goto comsub;
- }
-
- /* Cut off ending `)' */
- temp2[t_index] = '\0';
-
- if (chk_arithsub (temp2, t_index) == 0)
- {
- free (temp2);
-#if 0
- internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution"));
-#endif
- goto comsub;
- }
-
- /* Expand variables found inside the expression. */
- temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES);
- free (temp2);
-
-arithsub:
- /* No error messages. */
- this_command_name = (char *)NULL;
- number = evalexp (temp1, &expok);
- free (temp);
- free (temp1);
- if (expok == 0)
- {
- if (interactive_shell == 0 && posixly_correct)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- return (&expand_wdesc_fatal);
- }
- else
- return (&expand_wdesc_error);
- }
- temp = itos (number);
- break;
- }
-
-comsub:
- if (pflags & PF_NOCOMSUB)
- /* we need zindex+1 because string[zindex] == RPAREN */
- temp1 = substring (string, *sindex, zindex+1);
- else
- {
- tdesc = command_substitute (temp, quoted);
- temp1 = tdesc ? tdesc->word : (char *)NULL;
- if (tdesc)
- dispose_word_desc (tdesc);
- }
- FREE (temp);
- temp = temp1;
- break;
-
- /* Do POSIX.2d9-style arithmetic substitution. This will probably go
- away in a future bash release. */
- case '[':
- /* Extract the contents of this arithmetic substitution. */
- t_index = zindex + 1;
- temp = extract_arithmetic_subst (string, &t_index);
- zindex = t_index;
- if (temp == 0)
- {
- temp = savestring (string);
- if (expanded_something)
- *expanded_something = 0;
- goto return0;
- }
-
- /* Do initial variable expansion. */
- temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES);
-
- goto arithsub;
-
- default:
- /* Find the variable in VARIABLE_LIST. */
- temp = (char *)NULL;
-
- for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++)
- ;
- temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL;
-
- /* If this isn't a variable name, then just output the `$'. */
- if (temp1 == 0 || *temp1 == '\0')
- {
- FREE (temp1);
- temp = (char *)xmalloc (2);
- temp[0] = '$';
- temp[1] = '\0';
- if (expanded_something)
- *expanded_something = 0;
- goto return0;
- }
-
- /* If the variable exists, return its value cell. */
- var = find_variable (temp1);
-
- if (var && invisible_p (var) == 0 && var_isset (var))
- {
-#if defined (ARRAY_VARS)
- if (assoc_p (var) || array_p (var))
- {
- temp = array_p (var) ? array_reference (array_cell (var), 0)
- : assoc_reference (assoc_cell (var), "0");
- if (temp)
- temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp)
- : quote_escapes (temp);
- else if (unbound_vars_is_error)
- goto unbound_variable;
- }
- else
-#endif
- {
- temp = value_cell (var);
-
- temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp)
- : quote_escapes (temp);
- }
-
- free (temp1);
-
- goto return0;
- }
- else if (var = find_variable_last_nameref (temp1))
- {
- temp = nameref_cell (var);
-#if defined (ARRAY_VARS)
- if (temp && *temp && valid_array_reference (temp))
- {
- tdesc = parameter_brace_expand_word (temp, SPECIAL_VAR (temp, 0), quoted, pflags, (arrayind_t *)NULL);
- if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal)
- return (tdesc);
- ret = tdesc;
- goto return0;
- }
- else
-#endif
- /* y=2 ; typeset -n x=y; echo $x is not the same as echo $2 in ksh */
- if (temp && *temp && legal_identifier (temp) == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("%s: invalid variable name for name reference"), temp);
- return (&expand_wdesc_error); /* XXX */
- }
- else
- temp = (char *)NULL;
- }
-
- temp = (char *)NULL;
-
-unbound_variable:
- if (unbound_vars_is_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (temp1);
- }
- else
- {
- free (temp1);
- goto return0;
- }
-
- free (temp1);
- last_command_exit_value = EXECUTION_FAILURE;
- return ((unbound_vars_is_error && interactive_shell == 0)
- ? &expand_wdesc_fatal
- : &expand_wdesc_error);
- }
-
- if (string[zindex])
- zindex++;
-
-return0:
- *sindex = zindex;
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->flags = tflag; /* XXX */
- ret->word = temp;
- }
- return ret;
-}
-
-/* Make a word list which is the result of parameter and variable
- expansion, command substitution, arithmetic substitution, and
- quote removal of WORD. Return a pointer to a WORD_LIST which is
- the result of the expansion. If WORD contains a null word, the
- word list returned is also null.
-
- QUOTED contains flag values defined in shell.h.
-
- ISEXP is used to tell expand_word_internal that the word should be
- treated as the result of an expansion. This has implications for
- how IFS characters in the word are treated.
-
- CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null
- they point to an integer value which receives information about expansion.
- CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero.
- EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions,
- else zero.
-
- This only does word splitting in the case of $@ expansion. In that
- case, we split on ' '. */
-
-/* Values for the local variable quoted_state. */
-#define UNQUOTED 0
-#define PARTIALLY_QUOTED 1
-#define WHOLLY_QUOTED 2
-
-static WORD_LIST *
-expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something)
- WORD_DESC *word;
- int quoted, isexp;
- int *contains_dollar_at;
- int *expanded_something;
-{
- WORD_LIST *list;
- WORD_DESC *tword;
-
- /* The intermediate string that we build while expanding. */
- char *istring;
-
- /* The current size of the above object. */
- int istring_size;
-
- /* Index into ISTRING. */
- int istring_index;
-
- /* Temporary string storage. */
- char *temp, *temp1;
-
- /* The text of WORD. */
- register char *string;
-
- /* The size of STRING. */
- size_t string_size;
-
- /* The index into STRING. */
- int sindex;
-
- /* This gets 1 if we see a $@ while quoted. */
- int quoted_dollar_at;
-
- /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on
- whether WORD contains no quoting characters, a partially quoted
- string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */
- int quoted_state;
-
- /* State flags */
- int had_quoted_null;
- int has_dollar_at, temp_has_dollar_at;
- int split_on_spaces;
- int tflag;
- int pflags; /* flags passed to param_expand */
-
- int assignoff; /* If assignment, offset of `=' */
-
- register unsigned char c; /* Current character. */
- int t_index; /* For calls to string_extract_xxx. */
-
- char twochars[2];
-
- DECLARE_MBSTATE;
-
- istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE);
- istring[istring_index = 0] = '\0';
- quoted_dollar_at = had_quoted_null = has_dollar_at = 0;
- split_on_spaces = 0;
- quoted_state = UNQUOTED;
-
- string = word->word;
- if (string == 0)
- goto finished_with_string;
- /* Don't need the string length for the SADD... and COPY_ macros unless
- multibyte characters are possible. */
- string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1;
-
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- assignoff = -1;
-
- /* Begin the expansion. */
-
- for (sindex = 0; ;)
- {
- c = string[sindex];
-
- /* Case on toplevel character. */
- switch (c)
- {
- case '\0':
- goto finished_with_string;
-
- case CTLESC:
- sindex++;
-#if HANDLE_MULTIBYTE
- if (MB_CUR_MAX > 1 && string[sindex])
- {
- SADD_MBQCHAR_BODY(temp, string, sindex, string_size);
- }
- else
-#endif
- {
- temp = (char *)xmalloc (3);
- temp[0] = CTLESC;
- temp[1] = c = string[sindex];
- temp[2] = '\0';
- }
-
-dollar_add_string:
- if (string[sindex])
- sindex++;
-
-add_string:
- if (temp)
- {
- istring = sub_append_string (temp, istring, &istring_index, &istring_size);
- temp = (char *)0;
- }
-
- break;
-
-#if defined (PROCESS_SUBSTITUTION)
- /* Process substitution. */
- case '<':
- case '>':
- {
- if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct)
- {
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- t_index = sindex + 1; /* skip past both '<' and LPAREN */
-
- temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/
- sindex = t_index;
-
- /* If the process substitution specification is `<()', we want to
- open the pipe for writing in the child and produce output; if
- it is `>()', we want to open the pipe for reading in the child
- and consume input. */
- temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0;
-
- FREE (temp1);
-
- goto dollar_add_string;
- }
-#endif /* PROCESS_SUBSTITUTION */
-
- case '=':
- /* Posix.2 section 3.6.1 says that tildes following `=' in words
- which are not assignment statements are not expanded. If the
- shell isn't in posix mode, though, we perform tilde expansion
- on `likely candidate' unquoted assignment statements (flags
- include W_ASSIGNMENT but not W_QUOTED). A likely candidate
- contains an unquoted :~ or =~. Something to think about: we
- now have a flag that says to perform tilde expansion on arguments
- to `assignment builtins' like declare and export that look like
- assignment statements. We now do tilde expansion on such words
- even in POSIX mode. */
- if (word->flags & (W_ASSIGNRHS|W_NOTILDE))
- {
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
- }
- /* If we're not in posix mode or forcing assignment-statement tilde
- expansion, note where the `=' appears in the word and prepare to
- do tilde expansion following the first `='. */
- if ((word->flags & W_ASSIGNMENT) &&
- (posixly_correct == 0 || (word->flags & W_TILDEEXP)) &&
- assignoff == -1 && sindex > 0)
- assignoff = sindex;
- if (sindex == assignoff && string[sindex+1] == '~') /* XXX */
- word->flags |= W_ITILDE;
-#if 0
- else if ((word->flags & W_ASSIGNMENT) &&
- (posixly_correct == 0 || (word->flags & W_TILDEEXP)) &&
- string[sindex+1] == '~')
- word->flags |= W_ITILDE;
-#endif
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
-
- case ':':
- if (word->flags & W_NOTILDE)
- {
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
- }
-
- if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) &&
- string[sindex+1] == '~')
- word->flags |= W_ITILDE;
-
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
-
- case '~':
- /* If the word isn't supposed to be tilde expanded, or we're not
- at the start of a word or after an unquoted : or = in an
- assignment statement, we don't do tilde expansion. */
- if ((word->flags & (W_NOTILDE|W_DQUOTE)) ||
- (sindex > 0 && ((word->flags & W_ITILDE) == 0)) ||
- (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- {
- word->flags &= ~W_ITILDE;
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
- goto add_ifs_character;
- else
- goto add_character;
- }
-
- if (word->flags & W_ASSIGNRHS)
- tflag = 2;
- else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP))
- tflag = 1;
- else
- tflag = 0;
-
- temp = bash_tilde_find_word (string + sindex, tflag, &t_index);
-
- word->flags &= ~W_ITILDE;
-
- if (temp && *temp && t_index > 0)
- {
- temp1 = bash_tilde_expand (temp, tflag);
- if (temp1 && *temp1 == '~' && STREQ (temp, temp1))
- {
- FREE (temp);
- FREE (temp1);
- goto add_character; /* tilde expansion failed */
- }
- free (temp);
- temp = temp1;
- sindex += t_index;
- goto add_quoted_string; /* XXX was add_string */
- }
- else
- {
- FREE (temp);
- goto add_character;
- }
-
- case '$':
- if (expanded_something)
- *expanded_something = 1;
-
- temp_has_dollar_at = 0;
- pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0;
- if (word->flags & W_NOSPLIT2)
- pflags |= PF_NOSPLIT2;
- if (word->flags & W_ASSIGNRHS)
- pflags |= PF_ASSIGNRHS;
- tword = param_expand (string, &sindex, quoted, expanded_something,
- &temp_has_dollar_at, "ed_dollar_at,
- &had_quoted_null, pflags);
- has_dollar_at += temp_has_dollar_at;
- split_on_spaces += (tword->flags & W_SPLITSPACE);
-
- if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal)
- {
- free (string);
- free (istring);
- return ((tword == &expand_wdesc_error) ? &expand_word_error
- : &expand_word_fatal);
- }
- if (contains_dollar_at && has_dollar_at)
- *contains_dollar_at = 1;
-
- if (tword && (tword->flags & W_HASQUOTEDNULL))
- had_quoted_null = 1;
-
- temp = tword ? tword->word : (char *)NULL;
- dispose_word_desc (tword);
-
- /* Kill quoted nulls; we will add them back at the end of
- expand_word_internal if nothing else in the string */
- if (had_quoted_null && temp && QUOTED_NULL (temp))
- {
- FREE (temp);
- temp = (char *)NULL;
- }
-
- goto add_string;
- break;
-
- case '`': /* Backquoted command substitution. */
- {
- t_index = sindex++;
-
- temp = string_extract (string, &sindex, "`", SX_REQMATCH);
- /* The test of sindex against t_index is to allow bare instances of
- ` to pass through, for backwards compatibility. */
- if (temp == &extract_string_error || temp == &extract_string_fatal)
- {
- if (sindex - 1 == t_index)
- {
- sindex = t_index;
- goto add_character;
- }
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index);
- free (string);
- free (istring);
- return ((temp == &extract_string_error) ? &expand_word_error
- : &expand_word_fatal);
- }
-
- if (expanded_something)
- *expanded_something = 1;
-
- if (word->flags & W_NOCOMSUB)
- /* sindex + 1 because string[sindex] == '`' */
- temp1 = substring (string, t_index, sindex + 1);
- else
- {
- de_backslash (temp);
- tword = command_substitute (temp, quoted);
- temp1 = tword ? tword->word : (char *)NULL;
- if (tword)
- dispose_word_desc (tword);
- }
- FREE (temp);
- temp = temp1;
- goto dollar_add_string;
- }
-
- case '\\':
- if (string[sindex + 1] == '\n')
- {
- sindex += 2;
- continue;
- }
-
- c = string[++sindex];
-
- if (quoted & Q_HERE_DOCUMENT)
- tflag = CBSHDOC;
- else if (quoted & Q_DOUBLE_QUOTES)
- tflag = CBSDQUOTE;
- else
- tflag = 0;
-
- /* From Posix discussion on austin-group list: Backslash escaping
- a } in ${...} is removed. Issue 0000221 */
- if ((quoted & Q_DOLBRACE) && c == RBRACE)
- {
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
- /* This is the fix for " $@\ " */
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0) & isexp == 0 && isifs (c))
- {
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = CTLESC;
- istring[istring_index++] = '\\';
- istring[istring_index] = '\0';
-
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0))
- {
- SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size);
- }
- else if (c == 0)
- {
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- {
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
-
- sindex++;
-add_twochars:
- /* BEFORE jumping here, we need to increment sindex if appropriate */
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = twochars[0];
- istring[istring_index++] = twochars[1];
- istring[istring_index] = '\0';
-
- break;
-
- case '"':
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- goto add_character;
-
- t_index = ++sindex;
- temp = string_extract_double_quoted (string, &sindex, 0);
-
- /* If the quotes surrounded the entire string, then the
- whole word was quoted. */
- quoted_state = (t_index == 1 && string[sindex] == '\0')
- ? WHOLLY_QUOTED
- : PARTIALLY_QUOTED;
-
- if (temp && *temp)
- {
- tword = alloc_word_desc ();
- tword->word = temp;
-
- temp = (char *)NULL;
-
- temp_has_dollar_at = 0; /* XXX */
- /* Need to get W_HASQUOTEDNULL flag through this function. */
- list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &temp_has_dollar_at, (int *)NULL);
- has_dollar_at += temp_has_dollar_at;
-
- if (list == &expand_word_error || list == &expand_word_fatal)
- {
- free (istring);
- free (string);
- /* expand_word_internal has already freed temp_word->word
- for us because of the way it prints error messages. */
- tword->word = (char *)NULL;
- dispose_word (tword);
- return list;
- }
-
- dispose_word (tword);
-
- /* "$@" (a double-quoted dollar-at) expands into nothing,
- not even a NULL word, when there are no positional
- parameters. */
- if (list == 0 && has_dollar_at)
- {
- quoted_dollar_at++;
- break;
- }
-
- /* If we get "$@", we know we have expanded something, so we
- need to remember it for the final split on $IFS. This is
- a special case; it's the only case where a quoted string
- can expand into more than one word. It's going to come back
- from the above call to expand_word_internal as a list with
- a single word, in which all characters are quoted and
- separated by blanks. What we want to do is to turn it back
- into a list for the next piece of code. */
- if (list)
- dequote_list (list);
-
- if (list && list->word && (list->word->flags & W_HASQUOTEDNULL))
- had_quoted_null = 1; /* XXX */
-
- if (has_dollar_at)
- {
- quoted_dollar_at++;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- if (expanded_something)
- *expanded_something = 1;
- }
- }
- else
- {
- /* What we have is "". This is a minor optimization. */
- FREE (temp);
- list = (WORD_LIST *)NULL;
- }
-
- /* The code above *might* return a list (consider the case of "$@",
- where it returns "$1", "$2", etc.). We can't throw away the
- rest of the list, and we have to make sure each word gets added
- as quoted. We test on tresult->next: if it is non-NULL, we
- quote the whole list, save it to a string with string_list, and
- add that string. We don't need to quote the results of this
- (and it would be wrong, since that would quote the separators
- as well), so we go directly to add_string. */
- if (list)
- {
- if (list->next)
- {
- /* Testing quoted_dollar_at makes sure that "$@" is
- split correctly when $IFS does not contain a space. */
- temp = quoted_dollar_at
- ? string_list_dollar_at (list, Q_DOUBLE_QUOTES)
- : string_list (quote_list (list));
- dispose_words (list);
- goto add_string;
- }
- else
- {
- temp = savestring (list->word->word);
- tflag = list->word->flags;
- dispose_words (list);
-
- /* If the string is not a quoted null string, we want
- to remove any embedded unquoted CTLNUL characters.
- We do not want to turn quoted null strings back into
- the empty string, though. We do this because we
- want to remove any quoted nulls from expansions that
- contain other characters. For example, if we have
- x"$*"y or "x$*y" and there are no positional parameters,
- the $* should expand into nothing. */
- /* We use the W_HASQUOTEDNULL flag to differentiate the
- cases: a quoted null character as above and when
- CTLNUL is contained in the (non-null) expansion
- of some variable. We use the had_quoted_null flag to
- pass the value through this function to its caller. */
- if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0)
- remove_quoted_nulls (temp); /* XXX */
- }
- }
- else
- temp = (char *)NULL;
-
- /* We do not want to add quoted nulls to strings that are only
- partially quoted; we can throw them away. The exception to
- this is when we are going to be performing word splitting,
- since we have to preserve a null argument if the next character
- will cause word splitting. */
- if (temp == 0 && quoted_state == PARTIALLY_QUOTED && (word->flags & (W_NOSPLIT|W_NOSPLIT2)))
- continue;
-
- add_quoted_string:
-
- if (temp)
- {
- temp1 = temp;
- temp = quote_string (temp);
- free (temp1);
- goto add_string;
- }
- else
- {
- /* Add NULL arg. */
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
-
- /* break; */
-
- case '\'':
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- goto add_character;
-
- t_index = ++sindex;
- temp = string_extract_single_quoted (string, &sindex);
-
- /* If the entire STRING was surrounded by single quotes,
- then the string is wholly quoted. */
- quoted_state = (t_index == 1 && string[sindex] == '\0')
- ? WHOLLY_QUOTED
- : PARTIALLY_QUOTED;
-
- /* If all we had was '', it is a null expansion. */
- if (*temp == '\0')
- {
- free (temp);
- temp = (char *)NULL;
- }
- else
- remove_quoted_escapes (temp); /* ??? */
-
- /* We do not want to add quoted nulls to strings that are only
- partially quoted; such nulls are discarded. */
- if (temp == 0 && (quoted_state == PARTIALLY_QUOTED))
- continue;
-
- /* If we have a quoted null expansion, add a quoted NULL to istring. */
- if (temp == 0)
- {
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- goto add_quoted_string;
-
- /* break; */
-
- default:
- /* This is the fix for " $@ " */
- add_ifs_character:
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c)))
- {
- if (string[sindex]) /* from old goto dollar_add_string */
- sindex++;
- if (c == 0)
- {
- c = CTLNUL;
- goto add_character;
- }
- else
- {
-#if HANDLE_MULTIBYTE
- if (MB_CUR_MAX > 1)
- sindex--;
-
- if (MB_CUR_MAX > 1)
- {
- SADD_MBQCHAR_BODY(temp, string, sindex, string_size);
- }
- else
-#endif
- {
- twochars[0] = CTLESC;
- twochars[1] = c;
- goto add_twochars;
- }
- }
- }
-
- SADD_MBCHAR (temp, string, sindex, string_size);
-
- add_character:
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = c;
- istring[istring_index] = '\0';
-
- /* Next character. */
- sindex++;
- }
- }
-
-finished_with_string:
- /* OK, we're ready to return. If we have a quoted string, and
- quoted_dollar_at is not set, we do no splitting at all; otherwise
- we split on ' '. The routines that call this will handle what to
- do if nothing has been expanded. */
-
- /* Partially and wholly quoted strings which expand to the empty
- string are retained as an empty arguments. Unquoted strings
- which expand to the empty string are discarded. The single
- exception is the case of expanding "$@" when there are no
- positional parameters. In that case, we discard the expansion. */
-
- /* Because of how the code that handles "" and '' in partially
- quoted strings works, we need to make ISTRING into a QUOTED_NULL
- if we saw quoting characters, but the expansion was empty.
- "" and '' are tossed away before we get to this point when
- processing partially quoted strings. This makes "" and $xxx""
- equivalent when xxx is unset. We also look to see whether we
- saw a quoted null from a ${} expansion and add one back if we
- need to. */
-
- /* If we expand to nothing and there were no single or double quotes
- in the word, we throw it away. Otherwise, we return a NULL word.
- The single exception is for $@ surrounded by double quotes when
- there are no positional parameters. In that case, we also throw
- the word away. */
-
- if (*istring == '\0')
- {
- if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED))
- {
- istring[0] = CTLNUL;
- istring[1] = '\0';
- tword = make_bare_word (istring);
- tword->flags |= W_HASQUOTEDNULL; /* XXX */
- list = make_word_list (tword, (WORD_LIST *)NULL);
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- }
- /* According to sh, ksh, and Posix.2, if a word expands into nothing
- and a double-quoted "$@" appears anywhere in it, then the entire
- word is removed. */
- else if (quoted_state == UNQUOTED || quoted_dollar_at)
- list = (WORD_LIST *)NULL;
-#if 0
- else
- {
- tword = make_bare_word (istring);
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
-#else
- else
- list = (WORD_LIST *)NULL;
-#endif
- }
- else if (word->flags & W_NOSPLIT)
- {
- tword = make_bare_word (istring);
- if (word->flags & W_ASSIGNMENT)
- tword->flags |= W_ASSIGNMENT; /* XXX */
- if (word->flags & W_COMPASSIGN)
- tword->flags |= W_COMPASSIGN; /* XXX */
- if (word->flags & W_NOGLOB)
- tword->flags |= W_NOGLOB; /* XXX */
- if (word->flags & W_NOBRACE)
- tword->flags |= W_NOBRACE; /* XXX */
- if (word->flags & W_NOEXPAND)
- tword->flags |= W_NOEXPAND; /* XXX */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- if (had_quoted_null && QUOTED_NULL (istring))
- tword->flags |= W_HASQUOTEDNULL;
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
- else
- {
- char *ifs_chars;
-
- ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL;
-
- /* If we have $@, we need to split the results no matter what. If
- IFS is unset or NULL, string_list_dollar_at has separated the
- positional parameters with a space, so we split on space (we have
- set ifs_chars to " \t\n" above if ifs is unset). If IFS is set,
- string_list_dollar_at has separated the positional parameters
- with the first character of $IFS, so we split on $IFS. If
- SPLIT_ON_SPACES is set, we expanded $* (unquoted) with IFS either
- unset or null, and we want to make sure that we split on spaces
- regardless of what else has happened to IFS since the expansion. */
- if (split_on_spaces)
- list = list_string (istring, " ", 1); /* XXX quoted == 1? */
- else if (has_dollar_at && ifs_chars)
- list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1);
- else
- {
- tword = make_bare_word (istring);
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED))
- tword->flags |= W_QUOTED;
- if (word->flags & W_ASSIGNMENT)
- tword->flags |= W_ASSIGNMENT;
- if (word->flags & W_COMPASSIGN)
- tword->flags |= W_COMPASSIGN;
- if (word->flags & W_NOGLOB)
- tword->flags |= W_NOGLOB;
- if (word->flags & W_NOBRACE)
- tword->flags |= W_NOBRACE;
- if (word->flags & W_NOEXPAND)
- tword->flags |= W_NOEXPAND;
- if (had_quoted_null && QUOTED_NULL (istring))
- tword->flags |= W_HASQUOTEDNULL; /* XXX */
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
- }
-
- free (istring);
- return (list);
-}
-
-/* **************************************************************** */
-/* */
-/* Functions for Quote Removal */
-/* */
-/* **************************************************************** */
-
-/* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the
- backslash quoting rules for within double quotes or a here document. */
-char *
-string_quote_removal (string, quoted)
- char *string;
- int quoted;
-{
- size_t slen;
- char *r, *result_string, *temp, *send;
- int sindex, tindex, dquote;
- unsigned char c;
- DECLARE_MBSTATE;
-
- /* The result can be no longer than the original string. */
- slen = strlen (string);
- send = string + slen;
-
- r = result_string = (char *)xmalloc (slen + 1);
-
- for (dquote = sindex = 0; c = string[sindex];)
- {
- switch (c)
- {
- case '\\':
- c = string[++sindex];
- if (c == 0)
- {
- *r++ = '\\';
- break;
- }
- if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0)
- *r++ = '\\';
- /* FALLTHROUGH */
-
- default:
- SCOPY_CHAR_M (r, string, send, sindex);
- break;
-
- case '\'':
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote)
- {
- *r++ = c;
- sindex++;
- break;
- }
- tindex = sindex + 1;
- temp = string_extract_single_quoted (string, &tindex);
- if (temp)
- {
- strcpy (r, temp);
- r += strlen (r);
- free (temp);
- }
- sindex = tindex;
- break;
-
- case '"':
- dquote = 1 - dquote;
- sindex++;
- break;
- }
- }
- *r = '\0';
- return (result_string);
-}
-
-#if 0
-/* UNUSED */
-/* Perform quote removal on word WORD. This allocates and returns a new
- WORD_DESC *. */
-WORD_DESC *
-word_quote_removal (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_DESC *w;
- char *t;
-
- t = string_quote_removal (word->word, quoted);
- w = alloc_word_desc ();
- w->word = t ? t : savestring ("");
- return (w);
-}
-
-/* Perform quote removal on all words in LIST. If QUOTED is non-zero,
- the members of the list are treated as if they are surrounded by
- double quotes. Return a new list, or NULL if LIST is NULL. */
-WORD_LIST *
-word_list_quote_removal (list, quoted)
- WORD_LIST *list;
- int quoted;
-{
- WORD_LIST *result, *t, *tresult, *e;
-
- for (t = list, result = (WORD_LIST *)NULL; t; t = t->next)
- {
- tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL);
-#if 0
- result = (WORD_LIST *) list_append (result, tresult);
-#else
- if (result == 0)
- result = e = tresult;
- else
- {
- e->next = tresult;
- while (e->next)
- e = e->next;
- }
-#endif
- }
- return (result);
-}
-#endif
-
-/*******************************************
- * *
- * Functions to perform word splitting *
- * *
- *******************************************/
-
-void
-setifs (v)
- SHELL_VAR *v;
-{
- char *t;
- unsigned char uc;
-
- ifs_var = v;
- ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n";
-
- ifs_is_set = ifs_var != 0;
- ifs_is_null = ifs_is_set && (*ifs_value == 0);
-
- /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet
- handle multibyte chars in IFS */
- memset (ifs_cmap, '\0', sizeof (ifs_cmap));
- for (t = ifs_value ; t && *t; t++)
- {
- uc = *t;
- ifs_cmap[uc] = 1;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_value == 0)
- {
- ifs_firstc[0] = '\0';
- ifs_firstc_len = 1;
- }
- else
- {
- size_t ifs_len;
- ifs_len = strnlen (ifs_value, MB_CUR_MAX);
- ifs_firstc_len = MBLEN (ifs_value, ifs_len);
- if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len))
- {
- ifs_firstc[0] = ifs_value[0];
- ifs_firstc[1] = '\0';
- ifs_firstc_len = 1;
- }
- else
- memcpy (ifs_firstc, ifs_value, ifs_firstc_len);
- }
-#else
- ifs_firstc = ifs_value ? *ifs_value : 0;
-#endif
-}
-
-char *
-getifs ()
-{
- return ifs_value;
-}
-
-/* This splits a single word into a WORD LIST on $IFS, but only if the word
- is not quoted. list_string () performs quote removal for us, even if we
- don't do any splitting. */
-WORD_LIST *
-word_split (w, ifs_chars)
- WORD_DESC *w;
- char *ifs_chars;
-{
- WORD_LIST *result;
-
- if (w)
- {
- char *xifs;
-
- xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars;
- result = list_string (w->word, xifs, w->flags & W_QUOTED);
- }
- else
- result = (WORD_LIST *)NULL;
-
- return (result);
-}
-
-/* Perform word splitting on LIST and return the RESULT. It is possible
- to return (WORD_LIST *)NULL. */
-static WORD_LIST *
-word_list_split (list)
- WORD_LIST *list;
-{
- WORD_LIST *result, *t, *tresult, *e;
-
- for (t = list, result = (WORD_LIST *)NULL; t; t = t->next)
- {
- tresult = word_split (t->word, ifs_value);
- if (result == 0)
- result = e = tresult;
- else
- {
- e->next = tresult;
- while (e->next)
- e = e->next;
- }
- }
- return (result);
-}
-
-/**************************************************
- * *
- * Functions to expand an entire WORD_LIST *
- * *
- **************************************************/
-
-/* Do any word-expansion-specific cleanup and jump to top_level */
-static void
-exp_jump_to_top_level (v)
- int v;
-{
- set_pipestatus_from_exit (last_command_exit_value);
-
- /* Cleanup code goes here. */
- expand_no_split_dollar_star = 0; /* XXX */
- expanding_redir = 0;
- assigning_in_environment = 0;
-
- if (parse_and_execute_level == 0)
- top_level_cleanup (); /* from sig.c */
-
- jump_to_top_level (v);
-}
-
-/* Put NLIST (which is a WORD_LIST * of only one element) at the front of
- ELIST, and set ELIST to the new list. */
-#define PREPEND_LIST(nlist, elist) \
- do { nlist->next = elist; elist = nlist; } while (0)
-
-/* Separate out any initial variable assignments from TLIST. If set -k has
- been executed, remove all assignment statements from TLIST. Initial
- variable assignments and other environment assignments are placed
- on SUBST_ASSIGN_VARLIST. */
-static WORD_LIST *
-separate_out_assignments (tlist)
- WORD_LIST *tlist;
-{
- register WORD_LIST *vp, *lp;
-
- if (tlist == 0)
- return ((WORD_LIST *)NULL);
-
- if (subst_assign_varlist)
- dispose_words (subst_assign_varlist); /* Clean up after previous error */
-
- subst_assign_varlist = (WORD_LIST *)NULL;
- vp = lp = tlist;
-
- /* Separate out variable assignments at the start of the command.
- Loop invariant: vp->next == lp
- Loop postcondition:
- lp = list of words left after assignment statements skipped
- tlist = original list of words
- */
- while (lp && (lp->word->flags & W_ASSIGNMENT))
- {
- vp = lp;
- lp = lp->next;
- }
-
- /* If lp != tlist, we have some initial assignment statements.
- We make SUBST_ASSIGN_VARLIST point to the list of assignment
- words and TLIST point to the remaining words. */
- if (lp != tlist)
- {
- subst_assign_varlist = tlist;
- /* ASSERT(vp->next == lp); */
- vp->next = (WORD_LIST *)NULL; /* terminate variable list */
- tlist = lp; /* remainder of word list */
- }
-
- /* vp == end of variable list */
- /* tlist == remainder of original word list without variable assignments */
- if (!tlist)
- /* All the words in tlist were assignment statements */
- return ((WORD_LIST *)NULL);
-
- /* ASSERT(tlist != NULL); */
- /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */
-
- /* If the -k option is in effect, we need to go through the remaining
- words, separate out the assignment words, and place them on
- SUBST_ASSIGN_VARLIST. */
- if (place_keywords_in_env)
- {
- WORD_LIST *tp; /* tp == running pointer into tlist */
-
- tp = tlist;
- lp = tlist->next;
-
- /* Loop Invariant: tp->next == lp */
- /* Loop postcondition: tlist == word list without assignment statements */
- while (lp)
- {
- if (lp->word->flags & W_ASSIGNMENT)
- {
- /* Found an assignment statement, add this word to end of
- subst_assign_varlist (vp). */
- if (!subst_assign_varlist)
- subst_assign_varlist = vp = lp;
- else
- {
- vp->next = lp;
- vp = lp;
- }
-
- /* Remove the word pointed to by LP from TLIST. */
- tp->next = lp->next;
- /* ASSERT(vp == lp); */
- lp->next = (WORD_LIST *)NULL;
- lp = tp->next;
- }
- else
- {
- tp = lp;
- lp = lp->next;
- }
- }
- }
- return (tlist);
-}
-
-#define WEXP_VARASSIGN 0x001
-#define WEXP_BRACEEXP 0x002
-#define WEXP_TILDEEXP 0x004
-#define WEXP_PARAMEXP 0x008
-#define WEXP_PATHEXP 0x010
-
-/* All of the expansions, including variable assignments at the start of
- the list. */
-#define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP)
-
-/* All of the expansions except variable assignments at the start of
- the list. */
-#define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP)
-
-/* All of the `shell expansions': brace expansion, tilde expansion, parameter
- expansion, command substitution, arithmetic expansion, word splitting, and
- quote removal. */
-#define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP)
-
-/* Take the list of words in LIST and do the various substitutions. Return
- a new list of words which is the expanded list, and without things like
- variable assignments. */
-
-WORD_LIST *
-expand_words (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_ALL));
-}
-
-/* Same as expand_words (), but doesn't hack variable or environment
- variables. */
-WORD_LIST *
-expand_words_no_vars (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_NOVARS));
-}
-
-WORD_LIST *
-expand_words_shellexp (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_SHELLEXP));
-}
-
-static WORD_LIST *
-glob_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- char **glob_array, *temp_string;
- register int glob_index;
- WORD_LIST *glob_list, *output_list, *disposables, *next;
- WORD_DESC *tword;
-
- output_list = disposables = (WORD_LIST *)NULL;
- glob_array = (char **)NULL;
- while (tlist)
- {
- /* For each word, either globbing is attempted or the word is
- added to orig_list. If globbing succeeds, the results are
- added to orig_list and the word (tlist) is added to the list
- of disposable words. If globbing fails and failed glob
- expansions are left unchanged (the shell default), the
- original word is added to orig_list. If globbing fails and
- failed glob expansions are removed, the original word is
- added to the list of disposable words. orig_list ends up
- in reverse order and requires a call to REVERSE_LIST to
- be set right. After all words are examined, the disposable
- words are freed. */
- next = tlist->next;
-
- /* If the word isn't an assignment and contains an unquoted
- pattern matching character, then glob it. */
- if ((tlist->word->flags & W_NOGLOB) == 0 &&
- unquoted_glob_pattern_p (tlist->word->word))
- {
- glob_array = shell_glob_filename (tlist->word->word);
-
- /* Handle error cases.
- I don't think we should report errors like "No such file
- or directory". However, I would like to report errors
- like "Read failed". */
-
- if (glob_array == 0 || GLOB_FAILED (glob_array))
- {
- glob_array = (char **)xmalloc (sizeof (char *));
- glob_array[0] = (char *)NULL;
- }
-
- /* Dequote the current word in case we have to use it. */
- if (glob_array[0] == NULL)
- {
- temp_string = dequote_string (tlist->word->word);
- free (tlist->word->word);
- tlist->word->word = temp_string;
- }
-
- /* Make the array into a word list. */
- glob_list = (WORD_LIST *)NULL;
- for (glob_index = 0; glob_array[glob_index]; glob_index++)
- {
- tword = make_bare_word (glob_array[glob_index]);
- glob_list = make_word_list (tword, glob_list);
- }
-
- if (glob_list)
- {
- output_list = (WORD_LIST *)list_append (glob_list, output_list);
- PREPEND_LIST (tlist, disposables);
- }
- else if (fail_glob_expansion != 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- report_error (_("no match: %s"), tlist->word->word);
- exp_jump_to_top_level (DISCARD);
- }
- else if (allow_null_glob_expansion == 0)
- {
- /* Failed glob expressions are left unchanged. */
- PREPEND_LIST (tlist, output_list);
- }
- else
- {
- /* Failed glob expressions are removed. */
- PREPEND_LIST (tlist, disposables);
- }
- }
- else
- {
- /* Dequote the string. */
- temp_string = dequote_string (tlist->word->word);
- free (tlist->word->word);
- tlist->word->word = temp_string;
- PREPEND_LIST (tlist, output_list);
- }
-
- strvec_dispose (glob_array);
- glob_array = (char **)NULL;
-
- tlist = next;
- }
-
- if (disposables)
- dispose_words (disposables);
-
- if (output_list)
- output_list = REVERSE_LIST (output_list, WORD_LIST *);
-
- return (output_list);
-}
-
-#if defined (BRACE_EXPANSION)
-static WORD_LIST *
-brace_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- register char **expansions;
- char *temp_string;
- WORD_LIST *disposables, *output_list, *next;
- WORD_DESC *w;
- int eindex;
-
- for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next)
- {
- next = tlist->next;
-
- if (tlist->word->flags & W_NOBRACE)
- {
-/*itrace("brace_expand_word_list: %s: W_NOBRACE", tlist->word->word);*/
- PREPEND_LIST (tlist, output_list);
- continue;
- }
-
- if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
- {
-/*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/
- PREPEND_LIST (tlist, output_list);
- continue;
- }
-
- /* Only do brace expansion if the word has a brace character. If
- not, just add the word list element to BRACES and continue. In
- the common case, at least when running shell scripts, this will
- degenerate to a bunch of calls to `mbschr', and then what is
- basically a reversal of TLIST into BRACES, which is corrected
- by a call to REVERSE_LIST () on BRACES when the end of TLIST
- is reached. */
- if (mbschr (tlist->word->word, LBRACE))
- {
- expansions = brace_expand (tlist->word->word);
-
- for (eindex = 0; temp_string = expansions[eindex]; eindex++)
- {
- w = alloc_word_desc ();
- w->word = temp_string;
-
- /* If brace expansion didn't change the word, preserve
- the flags. We may want to preserve the flags
- unconditionally someday -- XXX */
- if (STREQ (temp_string, tlist->word->word))
- w->flags = tlist->word->flags;
- else
- w = make_word_flags (w, temp_string);
-
- output_list = make_word_list (w, output_list);
- }
- free (expansions);
-
- /* Add TLIST to the list of words to be freed after brace
- expansion has been performed. */
- PREPEND_LIST (tlist, disposables);
- }
- else
- PREPEND_LIST (tlist, output_list);
- }
-
- if (disposables)
- dispose_words (disposables);
-
- if (output_list)
- output_list = REVERSE_LIST (output_list, WORD_LIST *);
-
- return (output_list);
-}
-#endif
-
-#if defined (ARRAY_VARS)
-/* Take WORD, a compound associative array assignment, and internally run
- 'declare -A w', where W is the variable name portion of WORD. */
-static int
-make_internal_declare (word, option)
- char *word;
- char *option;
-{
- int t;
- WORD_LIST *wl;
- WORD_DESC *w;
-
- w = make_word (word);
-
- t = assignment (w->word, 0);
- w->word[t] = '\0';
-
- wl = make_word_list (w, (WORD_LIST *)NULL);
- wl = make_word_list (make_word (option), wl);
-
- return (declare_builtin (wl));
-}
-#endif
-
-static WORD_LIST *
-shell_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list;
- int expanded_something, has_dollar_at;
- char *temp_string;
-
- /* We do tilde expansion all the time. This is what 1003.2 says. */
- new_list = (WORD_LIST *)NULL;
- for (orig_list = tlist; tlist; tlist = next)
- {
- temp_string = tlist->word->word;
-
- next = tlist->next;
-
-#if defined (ARRAY_VARS)
- /* If this is a compound array assignment to a builtin that accepts
- such assignments (e.g., `declare'), take the assignment and perform
- it separately, handling the semantics of declarations inside shell
- functions. This avoids the double-evaluation of such arguments,
- because `declare' does some evaluation of compound assignments on
- its own. */
- if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
- {
- int t;
-
- if ((tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL)) == (W_ASSIGNASSOC|W_ASSNGLOBAL))
- make_internal_declare (tlist->word->word, "-gA");
- else if (tlist->word->flags & W_ASSIGNASSOC)
- make_internal_declare (tlist->word->word, "-A");
- else if ((tlist->word->flags & (W_ASSIGNARRAY|W_ASSNGLOBAL)) == (W_ASSIGNARRAY|W_ASSNGLOBAL))
- make_internal_declare (tlist->word->word, "-ga");
- else if (tlist->word->flags & W_ASSIGNARRAY)
- make_internal_declare (tlist->word->word, "-a");
- else if (tlist->word->flags & W_ASSNGLOBAL)
- make_internal_declare (tlist->word->word, "-g");
-
- t = do_word_assignment (tlist->word, 0);
- if (t == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
-
- /* Now transform the word as ksh93 appears to do and go on */
- t = assignment (tlist->word->word, 0);
- tlist->word->word[t] = '\0';
- tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC|W_ASSIGNARRAY);
- }
-#endif
-
- expanded_something = 0;
- expanded = expand_word_internal
- (tlist->word, 0, 0, &has_dollar_at, &expanded_something);
-
- if (expanded == &expand_word_error || expanded == &expand_word_fatal)
- {
- /* By convention, each time this error is returned,
- tlist->word->word has already been freed. */
- tlist->word->word = (char *)NULL;
-
- /* Dispose our copy of the original list. */
- dispose_words (orig_list);
- /* Dispose the new list we're building. */
- dispose_words (new_list);
-
- last_command_exit_value = EXECUTION_FAILURE;
- if (expanded == &expand_word_error)
- exp_jump_to_top_level (DISCARD);
- else
- exp_jump_to_top_level (FORCE_EOF);
- }
-
- /* Don't split words marked W_NOSPLIT. */
- if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0)
- {
- temp_list = word_list_split (expanded);
- dispose_words (expanded);
- }
- else
- {
- /* If no parameter expansion, command substitution, process
- substitution, or arithmetic substitution took place, then
- do not do word splitting. We still have to remove quoted
- null characters from the result. */
- word_list_remove_quoted_nulls (expanded);
- temp_list = expanded;
- }
-
- expanded = REVERSE_LIST (temp_list, WORD_LIST *);
- new_list = (WORD_LIST *)list_append (expanded, new_list);
- }
-
- if (orig_list)
- dispose_words (orig_list);
-
- if (new_list)
- new_list = REVERSE_LIST (new_list, WORD_LIST *);
-
- return (new_list);
-}
-
-/* The workhorse for expand_words () and expand_words_no_vars ().
- First arg is LIST, a WORD_LIST of words.
- Second arg EFLAGS is a flags word controlling which expansions are
- performed.
-
- This does all of the substitutions: brace expansion, tilde expansion,
- parameter expansion, command substitution, arithmetic expansion,
- process substitution, word splitting, and pathname expansion, according
- to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits
- set, or for which no expansion is done, do not undergo word splitting.
- Words with the W_NOGLOB bit set do not undergo pathname expansion; words
- with W_NOBRACE set do not undergo brace expansion (see
- brace_expand_word_list above). */
-static WORD_LIST *
-expand_word_list_internal (list, eflags)
- WORD_LIST *list;
- int eflags;
-{
- WORD_LIST *new_list, *temp_list;
- int tint;
-
- tempenv_assign_error = 0;
- if (list == 0)
- return ((WORD_LIST *)NULL);
-
- garglist = new_list = copy_word_list (list);
- if (eflags & WEXP_VARASSIGN)
- {
- garglist = new_list = separate_out_assignments (new_list);
- if (new_list == 0)
- {
- if (subst_assign_varlist)
- {
- /* All the words were variable assignments, so they are placed
- into the shell's environment. */
- for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next)
- {
- this_command_name = (char *)NULL; /* no arithmetic errors */
- tint = do_word_assignment (temp_list->word, 0);
- /* Variable assignment errors in non-interactive shells
- running in Posix.2 mode cause the shell to exit. */
- if (tint == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct)
- exp_jump_to_top_level (FORCE_EOF);
- else
- exp_jump_to_top_level (DISCARD);
- }
- }
- dispose_words (subst_assign_varlist);
- subst_assign_varlist = (WORD_LIST *)NULL;
- }
- return ((WORD_LIST *)NULL);
- }
- }
-
- /* Begin expanding the words that remain. The expansions take place on
- things that aren't really variable assignments. */
-
-#if defined (BRACE_EXPANSION)
- /* Do brace expansion on this word if there are any brace characters
- in the string. */
- if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list)
- new_list = brace_expand_word_list (new_list, eflags);
-#endif /* BRACE_EXPANSION */
-
- /* Perform the `normal' shell expansions: tilde expansion, parameter and
- variable substitution, command substitution, arithmetic expansion,
- and word splitting. */
- new_list = shell_expand_word_list (new_list, eflags);
-
- /* Okay, we're almost done. Now let's just do some filename
- globbing. */
- if (new_list)
- {
- if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0)
- /* Glob expand the word list unless globbing has been disabled. */
- new_list = glob_expand_word_list (new_list, eflags);
- else
- /* Dequote the words, because we're not performing globbing. */
- new_list = dequote_list (new_list);
- }
-
- if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist)
- {
- sh_wassign_func_t *assign_func;
- int is_special_builtin, is_builtin_or_func;
-
- /* If the remainder of the words expand to nothing, Posix.2 requires
- that the variable and environment assignments affect the shell's
- environment. */
- assign_func = new_list ? assign_in_env : do_word_assignment;
- tempenv_assign_error = 0;
-
- is_builtin_or_func = (new_list && new_list->word && (find_shell_builtin (new_list->word->word) || find_function (new_list->word->word)));
- /* Posix says that special builtins exit if a variable assignment error
- occurs in an assignment preceding it. */
- is_special_builtin = (posixly_correct && new_list && new_list->word && find_special_builtin (new_list->word->word));
-
- for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next)
- {
- this_command_name = (char *)NULL;
- assigning_in_environment = (assign_func == assign_in_env);
- tint = (*assign_func) (temp_list->word, is_builtin_or_func);
- assigning_in_environment = 0;
- /* Variable assignment errors in non-interactive shells running
- in Posix.2 mode cause the shell to exit. */
- if (tint == 0)
- {
- if (assign_func == do_word_assignment)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct && is_special_builtin)
- exp_jump_to_top_level (FORCE_EOF);
- else
- exp_jump_to_top_level (DISCARD);
- }
- else
- tempenv_assign_error++;
- }
- }
-
- dispose_words (subst_assign_varlist);
- subst_assign_varlist = (WORD_LIST *)NULL;
- }
-
- return (new_list);
-}
+++ /dev/null
-:; ./shx
-
-sh:
-<&$fd ok
-nlbq Mon Aug 3 02:45:00 EDT 1992
-bang geoff
-quote 712824302
-setbq defmsgid=<1992Aug3.024502.6176@host>
-bgwait sleep done... wait 6187
-
-
-bash:
-<&$fd ok
-nlbq Mon Aug 3 02:45:09 EDT 1992
-bang geoff
-quote 712824311
-setbq defmsgid=<1992Aug3.024512.6212@host>
-bgwait sleep done... wait 6223
-
-
-ash:
-<&$fd shx1: 4: Syntax error: Bad fd number
-nlbq Mon Aug 3 02:45:19 EDT 1992
-bang geoff
-quote getdate: `"now"' not a valid date
-
-setbq defmsgid=<1992Aug3.` echo 024521
-bgwait sleep done... wait 6241
-
-
-ksh:
-<&$fd ok
-nlbq ./shx: 6248 Memory fault - core dumped
-bang geoff
-quote getdate: `"now"' not a valid date
-
-setbq defmsgid=<1992Aug3.024530.6257@host>
-bgwait no such job: 6265
-wait 6265
-sleep done...
-
-zsh:
-<&$fd ok
-nlbq Mon Aug 3 02:45:36 EDT 1992
-bang shx3: event not found: /s/ [4]
-quote 712824337
-setbq defmsgid=<..6290@host>
-bgwait shx7: unmatched " [9]
-sleep done...
-:;
+++ /dev/null
-#! /bin/sh
-for cmd in sh bash ash ksh zsh
-do
- echo
- echo $cmd:
- for demo in shx?
- do
- $cmd $demo
- done
-done
+++ /dev/null
-/* trap.c -- Not the trap command, but useful functions for manipulating
- those objects. The trap command is in builtins/trap.def. */
-
-/* Copyright (C) 1987-2013 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashtypes.h"
-#include "bashansi.h"
-
-#include <stdio.h>
-#include <errno.h>
-
-#include "bashintl.h"
-
-#include <signal.h>
-
-#include "trap.h"
-
-#include "shell.h"
-#include "flags.h"
-#include "input.h" /* for save_token_state, restore_token_state */
-#include "jobs.h"
-#include "signames.h"
-#include "builtins.h"
-#include "builtins/common.h"
-#include "builtins/builtext.h"
-
-#if defined (READLINE)
-# include <readline/readline.h>
-# include "bashline.h"
-#endif
-
-#ifndef errno
-extern int errno;
-#endif
-
-/* Flags which describe the current handling state of a signal. */
-#define SIG_INHERITED 0x0 /* Value inherited from parent. */
-#define SIG_TRAPPED 0x1 /* Currently trapped. */
-#define SIG_HARD_IGNORE 0x2 /* Signal was ignored on shell entry. */
-#define SIG_SPECIAL 0x4 /* Treat this signal specially. */
-#define SIG_NO_TRAP 0x8 /* Signal cannot be trapped. */
-#define SIG_INPROGRESS 0x10 /* Signal handler currently executing. */
-#define SIG_CHANGED 0x20 /* Trap value changed in trap handler. */
-#define SIG_IGNORED 0x40 /* The signal is currently being ignored. */
-
-#define SPECIAL_TRAP(s) ((s) == EXIT_TRAP || (s) == DEBUG_TRAP || (s) == ERROR_TRAP || (s) == RETURN_TRAP)
-
-/* An array of such flags, one for each signal, describing what the
- shell will do with a signal. DEBUG_TRAP == NSIG; some code below
- assumes this. */
-static int sigmodes[BASH_NSIG];
-
-static void free_trap_command __P((int));
-static void change_signal __P((int, char *));
-
-static void get_original_signal __P((int));
-
-static int _run_trap_internal __P((int, char *));
-
-static void free_trap_string __P((int));
-static void reset_signal __P((int));
-static void restore_signal __P((int));
-static void reset_or_restore_signal_handlers __P((sh_resetsig_func_t *));
-
-/* Variables used here but defined in other files. */
-extern int last_command_exit_value;
-extern int line_number;
-
-extern int sigalrm_seen;
-extern procenv_t alrmbuf;
-
-extern char *this_command_name;
-extern sh_builtin_func_t *this_shell_builtin;
-extern procenv_t wait_intr_buf;
-extern int return_catch_flag, return_catch_value;
-extern int subshell_level;
-extern WORD_LIST *subst_assign_varlist;
-
-/* The list of things to do originally, before we started trapping. */
-SigHandler *original_signals[NSIG];
-
-/* For each signal, a slot for a string, which is a command to be
- executed when that signal is recieved. The slot can also contain
- DEFAULT_SIG, which means do whatever you were going to do before
- you were so rudely interrupted, or IGNORE_SIG, which says ignore
- this signal. */
-char *trap_list[BASH_NSIG];
-
-/* A bitmap of signals received for which we have trap handlers. */
-int pending_traps[NSIG];
-
-/* Set to the number of the signal we're running the trap for + 1.
- Used in execute_cmd.c and builtins/common.c to clean up when
- parse_and_execute does not return normally after executing the
- trap command (e.g., when `return' is executed in the trap command). */
-int running_trap;
-
-/* Set to last_command_exit_value before running a trap. */
-int trap_saved_exit_value;
-
-/* The (trapped) signal received while executing in the `wait' builtin */
-int wait_signal_received;
-
-int trapped_signal_received;
-
-#define GETORIGSIG(sig) \
- do { \
- original_signals[sig] = (SigHandler *)set_signal_handler (sig, SIG_DFL); \
- set_signal_handler (sig, original_signals[sig]); \
- if (original_signals[sig] == SIG_IGN) \
- sigmodes[sig] |= SIG_HARD_IGNORE; \
- } while (0)
-
-#define SETORIGSIG(sig,handler) \
- do { \
- original_signals[sig] = handler; \
- if (original_signals[sig] == SIG_IGN) \
- sigmodes[sig] |= SIG_HARD_IGNORE; \
- } while (0)
-
-#define GET_ORIGINAL_SIGNAL(sig) \
- if (sig && sig < NSIG && original_signals[sig] == IMPOSSIBLE_TRAP_HANDLER) \
- GETORIGSIG(sig)
-
-void
-initialize_traps ()
-{
- register int i;
-
- initialize_signames();
-
- trap_list[EXIT_TRAP] = trap_list[DEBUG_TRAP] = trap_list[ERROR_TRAP] = trap_list[RETURN_TRAP] = (char *)NULL;
- sigmodes[EXIT_TRAP] = sigmodes[DEBUG_TRAP] = sigmodes[ERROR_TRAP] = sigmodes[RETURN_TRAP] = SIG_INHERITED;
- original_signals[EXIT_TRAP] = IMPOSSIBLE_TRAP_HANDLER;
-
- for (i = 1; i < NSIG; i++)
- {
- pending_traps[i] = 0;
- trap_list[i] = (char *)DEFAULT_SIG;
- sigmodes[i] = SIG_INHERITED; /* XXX - only set, not used */
- original_signals[i] = IMPOSSIBLE_TRAP_HANDLER;
- }
-
- /* Show which signals are treated specially by the shell. */
-#if defined (SIGCHLD)
- GETORIGSIG (SIGCHLD);
- sigmodes[SIGCHLD] |= (SIG_SPECIAL | SIG_NO_TRAP);
-#endif /* SIGCHLD */
-
- GETORIGSIG (SIGINT);
- sigmodes[SIGINT] |= SIG_SPECIAL;
-
-#if defined (__BEOS__)
- /* BeOS sets SIGINT to SIG_IGN! */
- original_signals[SIGINT] = SIG_DFL;
- sigmodes[SIGINT] &= ~SIG_HARD_IGNORE;
-#endif
-
- GETORIGSIG (SIGQUIT);
- sigmodes[SIGQUIT] |= SIG_SPECIAL;
-
- if (interactive)
- {
- GETORIGSIG (SIGTERM);
- sigmodes[SIGTERM] |= SIG_SPECIAL;
- }
-}
-
-#ifdef DEBUG
-/* Return a printable representation of the trap handler for SIG. */
-static char *
-trap_handler_string (sig)
- int sig;
-{
- if (trap_list[sig] == (char *)DEFAULT_SIG)
- return "DEFAULT_SIG";
- else if (trap_list[sig] == (char *)IGNORE_SIG)
- return "IGNORE_SIG";
- else if (trap_list[sig] == (char *)IMPOSSIBLE_TRAP_HANDLER)
- return "IMPOSSIBLE_TRAP_HANDLER";
- else if (trap_list[sig])
- return trap_list[sig];
- else
- return "NULL";
-}
-#endif
-
-/* Return the print name of this signal. */
-char *
-signal_name (sig)
- int sig;
-{
- char *ret;
-
- /* on cygwin32, signal_names[sig] could be null */
- ret = (sig >= BASH_NSIG || sig < 0 || signal_names[sig] == NULL)
- ? _("invalid signal number")
- : signal_names[sig];
-
- return ret;
-}
-
-/* Turn a string into a signal number, or a number into
- a signal number. If STRING is "2", "SIGINT", or "INT",
- then (int)2 is returned. Return NO_SIG if STRING doesn't
- contain a valid signal descriptor. */
-int
-decode_signal (string, flags)
- char *string;
- int flags;
-{
- intmax_t sig;
- char *name;
-
- if (legal_number (string, &sig))
- return ((sig >= 0 && sig < NSIG) ? (int)sig : NO_SIG);
-
- /* A leading `SIG' may be omitted. */
- for (sig = 0; sig < BASH_NSIG; sig++)
- {
- name = signal_names[sig];
- if (name == 0 || name[0] == '\0')
- continue;
-
- /* Check name without the SIG prefix first case sensitivly or
- insensitively depending on whether flags includes DSIG_NOCASE */
- if (STREQN (name, "SIG", 3))
- {
- name += 3;
-
- if ((flags & DSIG_NOCASE) && strcasecmp (string, name) == 0)
- return ((int)sig);
- else if ((flags & DSIG_NOCASE) == 0 && strcmp (string, name) == 0)
- return ((int)sig);
- /* If we can't use the `SIG' prefix to match, punt on this
- name now. */
- else if ((flags & DSIG_SIGPREFIX) == 0)
- continue;
- }
-
- /* Check name with SIG prefix case sensitively or insensitively
- depending on whether flags includes DSIG_NOCASE */
- name = signal_names[sig];
- if ((flags & DSIG_NOCASE) && strcasecmp (string, name) == 0)
- return ((int)sig);
- else if ((flags & DSIG_NOCASE) == 0 && strcmp (string, name) == 0)
- return ((int)sig);
- }
-
- return (NO_SIG);
-}
-
-/* Non-zero when we catch a trapped signal. */
-static int catch_flag;
-
-void
-run_pending_traps ()
-{
- register int sig;
- int old_exit_value, *token_state;
- WORD_LIST *save_subst_varlist;
-#if defined (ARRAY_VARS)
- ARRAY *ps;
-#endif
-
- if (catch_flag == 0) /* simple optimization */
- return;
-
- catch_flag = trapped_signal_received = 0;
-
- /* Preserve $? when running trap. */
- old_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps = save_pipestatus_array ();
-#endif
-
- for (sig = 1; sig < NSIG; sig++)
- {
- /* XXX this could be made into a counter by using
- while (pending_traps[sig]--) instead of the if statement. */
- if (pending_traps[sig])
- {
- sigset_t set, oset;
-
- BLOCK_SIGNAL (sig, set, oset);
-
- if (sig == SIGINT)
- {
- run_interrupt_trap ();
- CLRINTERRUPT;
- }
-#if defined (JOB_CONTROL) && defined (SIGCHLD)
- else if (sig == SIGCHLD &&
- trap_list[SIGCHLD] != (char *)IMPOSSIBLE_TRAP_HANDLER &&
- (sigmodes[SIGCHLD] & SIG_INPROGRESS) == 0)
- {
- sigmodes[SIGCHLD] |= SIG_INPROGRESS;
- run_sigchld_trap (pending_traps[sig]); /* use as counter */
- sigmodes[SIGCHLD] &= ~SIG_INPROGRESS;
- }
- else if (sig == SIGCHLD &&
- trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER &&
- (sigmodes[SIGCHLD] & SIG_INPROGRESS) != 0)
- {
- /* This can happen when run_pending_traps is called while
- running a SIGCHLD trap handler. */
- UNBLOCK_SIGNAL (oset);
- continue; /* XXX */
- }
-#endif
- else if (trap_list[sig] == (char *)DEFAULT_SIG ||
- trap_list[sig] == (char *)IGNORE_SIG ||
- trap_list[sig] == (char *)IMPOSSIBLE_TRAP_HANDLER)
- {
- /* This is possible due to a race condition. Say a bash
- process has SIGTERM trapped. A subshell is spawned
- using { list; } & and the parent does something and kills
- the subshell with SIGTERM. It's possible for the subshell
- to set pending_traps[SIGTERM] to 1 before the code in
- execute_cmd.c eventually calls restore_original_signals
- to reset the SIGTERM signal handler in the subshell. The
- next time run_pending_traps is called, pending_traps[SIGTERM]
- will be 1, but the trap handler in trap_list[SIGTERM] will
- be invalid (probably DEFAULT_SIG, but it could be IGNORE_SIG).
- Unless we catch this, the subshell will dump core when
- trap_list[SIGTERM] == DEFAULT_SIG, because DEFAULT_SIG is
- usually 0x0. */
- internal_warning (_("run_pending_traps: bad value in trap_list[%d]: %p"),
- sig, trap_list[sig]);
- if (trap_list[sig] == (char *)DEFAULT_SIG)
- {
- internal_warning (_("run_pending_traps: signal handler is SIG_DFL, resending %d (%s) to myself"), sig, signal_name (sig));
- kill (getpid (), sig);
- }
- }
- else
- {
- token_state = save_token_state ();
- save_subst_varlist = subst_assign_varlist;
- subst_assign_varlist = 0;
-
- evalstring (savestring (trap_list[sig]), "trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
- restore_token_state (token_state);
- free (token_state);
-
- subst_assign_varlist = save_subst_varlist;
- }
-
- pending_traps[sig] = 0;
-
- UNBLOCK_SIGNAL (oset);
- }
- }
-
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps);
-#endif
- last_command_exit_value = old_exit_value;
-}
-
-sighandler
-trap_handler (sig)
- int sig;
-{
- int oerrno;
-
- if ((sigmodes[sig] & SIG_TRAPPED) == 0)
- {
-#if defined (DEBUG)
- internal_warning ("trap_handler: signal %d: signal not trapped", sig);
-#endif
- SIGRETURN (0);
- }
-
- if ((sig >= NSIG) ||
- (trap_list[sig] == (char *)DEFAULT_SIG) ||
- (trap_list[sig] == (char *)IGNORE_SIG))
- programming_error (_("trap_handler: bad signal %d"), sig);
- else
- {
- oerrno = errno;
-#if defined (MUST_REINSTALL_SIGHANDLERS)
-# if defined (JOB_CONTROL) && defined (SIGCHLD)
- if (sig != SIGCHLD)
-# endif /* JOB_CONTROL && SIGCHLD */
- set_signal_handler (sig, trap_handler);
-#endif /* MUST_REINSTALL_SIGHANDLERS */
-
- catch_flag = 1;
- pending_traps[sig]++;
-
- trapped_signal_received = sig;
-
- if (this_shell_builtin && (this_shell_builtin == wait_builtin))
- {
- wait_signal_received = sig;
- if (interrupt_immediately)
- longjmp (wait_intr_buf, 1);
- }
-
-#if defined (READLINE)
- /* Set the event hook so readline will call it after the signal handlers
- finish executing, so if this interrupted character input we can get
- quick response. */
- if (RL_ISSTATE (RL_STATE_SIGHANDLER) && interrupt_immediately == 0)
- bashline_set_event_hook ();
-#endif
-
- if (interrupt_immediately)
- run_pending_traps ();
-
- errno = oerrno;
- }
-
- SIGRETURN (0);
-}
-
-int
-first_pending_trap ()
-{
- register int i;
-
- for (i = 1; i < NSIG; i++)
- if (pending_traps[i])
- return i;
- return -1;
-}
-
-int
-any_signals_trapped ()
-{
- register int i;
-
- for (i = 1; i < NSIG; i++)
- if (sigmodes[i] & SIG_TRAPPED)
- return i;
- return -1;
-}
-
-void
-check_signals ()
-{
- CHECK_ALRM; /* set by the read builtin */
- QUIT;
-}
-
-/* Convenience functions the rest of the shell can use */
-void
-check_signals_and_traps ()
-{
- check_signals ();
-
- run_pending_traps ();
-}
-
-#if defined (JOB_CONTROL) && defined (SIGCHLD)
-
-#ifdef INCLUDE_UNUSED
-/* Make COMMAND_STRING be executed when SIGCHLD is caught. */
-void
-set_sigchld_trap (command_string)
- char *command_string;
-{
- set_signal (SIGCHLD, command_string);
-}
-#endif
-
-/* Make COMMAND_STRING be executed when SIGCHLD is caught iff SIGCHLD
- is not already trapped. IMPOSSIBLE_TRAP_HANDLER is used as a sentinel
- to make sure that a SIGCHLD trap handler run via run_sigchld_trap can
- reset the disposition to the default and not have the original signal
- accidentally restored, undoing the user's command. */
-void
-maybe_set_sigchld_trap (command_string)
- char *command_string;
-{
- if ((sigmodes[SIGCHLD] & SIG_TRAPPED) == 0 && trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER)
- set_signal (SIGCHLD, command_string);
-}
-
-/* Temporarily set the SIGCHLD trap string to IMPOSSIBLE_TRAP_HANDLER. Used
- as a sentinel in run_sigchld_trap and maybe_set_sigchld_trap to see whether
- or not a SIGCHLD trap handler reset SIGCHLD disposition to the default. */
-void
-set_impossible_sigchld_trap ()
-{
- restore_default_signal (SIGCHLD);
- change_signal (SIGCHLD, (char *)IMPOSSIBLE_TRAP_HANDLER);
- sigmodes[SIGCHLD] &= ~SIG_TRAPPED; /* maybe_set_sigchld_trap checks this */
-}
-
-/* Act as if we received SIGCHLD NCHILD times and increment
- pending_traps[SIGCHLD] by that amount. This allows us to still run the
- SIGCHLD trap once for each exited child. */
-void
-queue_sigchld_trap (nchild)
- int nchild;
-{
- if (nchild > 0)
- {
- catch_flag = 1;
- pending_traps[SIGCHLD] += nchild;
- trapped_signal_received = SIGCHLD;
- }
-}
-#endif /* JOB_CONTROL && SIGCHLD */
-
-void
-set_debug_trap (command)
- char *command;
-{
- set_signal (DEBUG_TRAP, command);
-}
-
-void
-set_error_trap (command)
- char *command;
-{
- set_signal (ERROR_TRAP, command);
-}
-
-void
-set_return_trap (command)
- char *command;
-{
- set_signal (RETURN_TRAP, command);
-}
-
-#ifdef INCLUDE_UNUSED
-void
-set_sigint_trap (command)
- char *command;
-{
- set_signal (SIGINT, command);
-}
-#endif
-
-/* Reset the SIGINT handler so that subshells that are doing `shellsy'
- things, like waiting for command substitution or executing commands
- in explicit subshells ( ( cmd ) ), can catch interrupts properly. */
-SigHandler *
-set_sigint_handler ()
-{
- if (sigmodes[SIGINT] & SIG_HARD_IGNORE)
- return ((SigHandler *)SIG_IGN);
-
- else if (sigmodes[SIGINT] & SIG_IGNORED)
- return ((SigHandler *)set_signal_handler (SIGINT, SIG_IGN)); /* XXX */
-
- else if (sigmodes[SIGINT] & SIG_TRAPPED)
- return ((SigHandler *)set_signal_handler (SIGINT, trap_handler));
-
- /* The signal is not trapped, so set the handler to the shell's special
- interrupt handler. */
- else if (interactive) /* XXX - was interactive_shell */
- return (set_signal_handler (SIGINT, sigint_sighandler));
- else
- return (set_signal_handler (SIGINT, termsig_sighandler));
-}
-
-/* Return the correct handler for signal SIG according to the values in
- sigmodes[SIG]. */
-SigHandler *
-trap_to_sighandler (sig)
- int sig;
-{
- if (sigmodes[sig] & (SIG_IGNORED|SIG_HARD_IGNORE))
- return (SIG_IGN);
- else if (sigmodes[sig] & SIG_TRAPPED)
- return (trap_handler);
- else
- return (SIG_DFL);
-}
-
-/* Set SIG to call STRING as a command. */
-void
-set_signal (sig, string)
- int sig;
- char *string;
-{
- sigset_t set, oset;
-
- if (SPECIAL_TRAP (sig))
- {
- change_signal (sig, savestring (string));
- if (sig == EXIT_TRAP && interactive == 0)
- initialize_terminating_signals ();
- return;
- }
-
- /* A signal ignored on entry to the shell cannot be trapped or reset, but
- no error is reported when attempting to do so. -- Posix.2 */
- if (sigmodes[sig] & SIG_HARD_IGNORE)
- return;
-
- /* Make sure we have original_signals[sig] if the signal has not yet
- been trapped. */
- if ((sigmodes[sig] & SIG_TRAPPED) == 0)
- {
- /* If we aren't sure of the original value, check it. */
- if (original_signals[sig] == IMPOSSIBLE_TRAP_HANDLER)
- GETORIGSIG (sig);
- if (original_signals[sig] == SIG_IGN)
- return;
- }
-
- /* Only change the system signal handler if SIG_NO_TRAP is not set.
- The trap command string is changed in either case. The shell signal
- handlers for SIGINT and SIGCHLD run the user specified traps in an
- environment in which it is safe to do so. */
- if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
- {
- BLOCK_SIGNAL (sig, set, oset);
- change_signal (sig, savestring (string));
- set_signal_handler (sig, trap_handler);
- UNBLOCK_SIGNAL (oset);
- }
- else
- change_signal (sig, savestring (string));
-}
-
-static void
-free_trap_command (sig)
- int sig;
-{
- if ((sigmodes[sig] & SIG_TRAPPED) && trap_list[sig] &&
- (trap_list[sig] != (char *)IGNORE_SIG) &&
- (trap_list[sig] != (char *)DEFAULT_SIG) &&
- (trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER))
- free (trap_list[sig]);
-}
-
-/* If SIG has a string assigned to it, get rid of it. Then give it
- VALUE. */
-static void
-change_signal (sig, value)
- int sig;
- char *value;
-{
- if ((sigmodes[sig] & SIG_INPROGRESS) == 0)
- free_trap_command (sig);
- trap_list[sig] = value;
-
- sigmodes[sig] |= SIG_TRAPPED;
- if (value == (char *)IGNORE_SIG)
- sigmodes[sig] |= SIG_IGNORED;
- else
- sigmodes[sig] &= ~SIG_IGNORED;
- if (sigmodes[sig] & SIG_INPROGRESS)
- sigmodes[sig] |= SIG_CHANGED;
-}
-
-static void
-get_original_signal (sig)
- int sig;
-{
- /* If we aren't sure the of the original value, then get it. */
- if (sig > 0 && sig < NSIG && original_signals[sig] == (SigHandler *)IMPOSSIBLE_TRAP_HANDLER)
- GETORIGSIG (sig);
-}
-
-void
-get_all_original_signals ()
-{
- register int i;
-
- for (i = 1; i < NSIG; i++)
- GET_ORIGINAL_SIGNAL (i);
-}
-
-void
-set_original_signal (sig, handler)
- int sig;
- SigHandler *handler;
-{
- if (sig > 0 && sig < NSIG && original_signals[sig] == (SigHandler *)IMPOSSIBLE_TRAP_HANDLER)
- SETORIGSIG (sig, handler);
-}
-
-/* Restore the default action for SIG; i.e., the action the shell
- would have taken before you used the trap command. This is called
- from trap_builtin (), which takes care to restore the handlers for
- the signals the shell treats specially. */
-void
-restore_default_signal (sig)
- int sig;
-{
- if (SPECIAL_TRAP (sig))
- {
- if ((sig != DEBUG_TRAP && sig != ERROR_TRAP && sig != RETURN_TRAP) ||
- (sigmodes[sig] & SIG_INPROGRESS) == 0)
- free_trap_command (sig);
- trap_list[sig] = (char *)NULL;
- sigmodes[sig] &= ~SIG_TRAPPED;
- if (sigmodes[sig] & SIG_INPROGRESS)
- sigmodes[sig] |= SIG_CHANGED;
- return;
- }
-
- GET_ORIGINAL_SIGNAL (sig);
-
- /* A signal ignored on entry to the shell cannot be trapped or reset, but
- no error is reported when attempting to do so. Thanks Posix.2. */
- if (sigmodes[sig] & SIG_HARD_IGNORE)
- return;
-
- /* If we aren't trapping this signal, don't bother doing anything else. */
- if ((sigmodes[sig] & SIG_TRAPPED) == 0)
- return;
-
- /* Only change the signal handler for SIG if it allows it. */
- if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
- set_signal_handler (sig, original_signals[sig]);
-
- /* Change the trap command in either case. */
- change_signal (sig, (char *)DEFAULT_SIG);
-
- /* Mark the signal as no longer trapped. */
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-/* Make this signal be ignored. */
-void
-ignore_signal (sig)
- int sig;
-{
- if (SPECIAL_TRAP (sig) && ((sigmodes[sig] & SIG_IGNORED) == 0))
- {
- change_signal (sig, (char *)IGNORE_SIG);
- return;
- }
-
- GET_ORIGINAL_SIGNAL (sig);
-
- /* A signal ignored on entry to the shell cannot be trapped or reset.
- No error is reported when the user attempts to do so. */
- if (sigmodes[sig] & SIG_HARD_IGNORE)
- return;
-
- /* If already trapped and ignored, no change necessary. */
- if (sigmodes[sig] & SIG_IGNORED)
- return;
-
- /* Only change the signal handler for SIG if it allows it. */
- if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
- set_signal_handler (sig, SIG_IGN);
-
- /* Change the trap command in either case. */
- change_signal (sig, (char *)IGNORE_SIG);
-}
-
-/* Handle the calling of "trap 0". The only sticky situation is when
- the command to be executed includes an "exit". This is why we have
- to provide our own place for top_level to jump to. */
-int
-run_exit_trap ()
-{
- char *trap_command;
- int code, function_code, retval;
-#if defined (ARRAY_VARS)
- ARRAY *ps;
-#endif
-
- trap_saved_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps = save_pipestatus_array ();
-#endif
- function_code = 0;
-
- /* Run the trap only if signal 0 is trapped and not ignored, and we are not
- currently running in the trap handler (call to exit in the list of
- commands given to trap 0). */
- if ((sigmodes[EXIT_TRAP] & SIG_TRAPPED) &&
- (sigmodes[EXIT_TRAP] & (SIG_IGNORED|SIG_INPROGRESS)) == 0)
- {
- trap_command = savestring (trap_list[EXIT_TRAP]);
- sigmodes[EXIT_TRAP] &= ~SIG_TRAPPED;
- sigmodes[EXIT_TRAP] |= SIG_INPROGRESS;
-
- retval = trap_saved_exit_value;
- running_trap = 1;
-
- code = setjmp_nosigs (top_level);
-
- /* If we're in a function, make sure return longjmps come here, too. */
- if (return_catch_flag)
- function_code = setjmp_nosigs (return_catch);
-
- if (code == 0 && function_code == 0)
- {
- reset_parser ();
- parse_and_execute (trap_command, "exit trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
- }
- else if (code == ERREXIT)
- retval = last_command_exit_value;
- else if (code == EXITPROG)
- retval = last_command_exit_value;
- else if (function_code != 0)
- retval = return_catch_value;
- else
- retval = trap_saved_exit_value;
-
- running_trap = 0;
- return retval;
- }
-
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps);
-#endif
- return (trap_saved_exit_value);
-}
-
-void
-run_trap_cleanup (sig)
- int sig;
-{
- sigmodes[sig] &= ~(SIG_INPROGRESS|SIG_CHANGED);
-}
-
-/* Run a trap command for SIG. SIG is one of the signals the shell treats
- specially. Returns the exit status of the executed trap command list. */
-static int
-_run_trap_internal (sig, tag)
- int sig;
- char *tag;
-{
- char *trap_command, *old_trap;
- int trap_exit_value, *token_state;
- volatile int save_return_catch_flag, function_code;
- int flags;
- procenv_t save_return_catch;
- WORD_LIST *save_subst_varlist;
-#if defined (ARRAY_VARS)
- ARRAY *ps;
-#endif
-
- trap_exit_value = function_code = 0;
- /* Run the trap only if SIG is trapped and not ignored, and we are not
- currently executing in the trap handler. */
- if ((sigmodes[sig] & SIG_TRAPPED) && ((sigmodes[sig] & SIG_IGNORED) == 0) &&
- (trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER) &&
- ((sigmodes[sig] & SIG_INPROGRESS) == 0))
- {
- old_trap = trap_list[sig];
- sigmodes[sig] |= SIG_INPROGRESS;
- sigmodes[sig] &= ~SIG_CHANGED; /* just to be sure */
- trap_command = savestring (old_trap);
-
- running_trap = sig + 1;
- trap_saved_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps = save_pipestatus_array ();
-#endif
-
- token_state = save_token_state ();
- save_subst_varlist = subst_assign_varlist;
- subst_assign_varlist = 0;
-
- /* If we're in a function, make sure return longjmps come here, too. */
- save_return_catch_flag = return_catch_flag;
- if (return_catch_flag)
- {
- COPY_PROCENV (return_catch, save_return_catch);
- function_code = setjmp_nosigs (return_catch);
- }
-
- flags = SEVAL_NONINT|SEVAL_NOHIST;
- if (sig != DEBUG_TRAP && sig != RETURN_TRAP && sig != ERROR_TRAP)
- flags |= SEVAL_RESETLINE;
- if (function_code == 0)
- parse_and_execute (trap_command, tag, flags);
-
- restore_token_state (token_state);
- free (token_state);
-
- subst_assign_varlist = save_subst_varlist;
-
- trap_exit_value = last_command_exit_value;
- last_command_exit_value = trap_saved_exit_value;
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps);
-#endif
- running_trap = 0;
-
- sigmodes[sig] &= ~SIG_INPROGRESS;
-
- if (sigmodes[sig] & SIG_CHANGED)
- {
-#if 0
- /* Special traps like EXIT, DEBUG, RETURN are handled explicitly in
- the places where they can be changed using unwind-protects. For
- example, look at execute_cmd.c:execute_function(). */
- if (SPECIAL_TRAP (sig) == 0)
-#endif
- free (old_trap);
- sigmodes[sig] &= ~SIG_CHANGED;
- }
-
- if (save_return_catch_flag)
- {
- return_catch_flag = save_return_catch_flag;
- return_catch_value = trap_exit_value;
- COPY_PROCENV (save_return_catch, return_catch);
- if (function_code)
- longjmp (return_catch, 1);
- }
- }
-
- return trap_exit_value;
-}
-
-int
-run_debug_trap ()
-{
- int trap_exit_value;
- pid_t save_pgrp;
- int save_pipe[2];
-
- /* XXX - question: should the DEBUG trap inherit the RETURN trap? */
- trap_exit_value = 0;
- if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && ((sigmodes[DEBUG_TRAP] & SIG_IGNORED) == 0) && ((sigmodes[DEBUG_TRAP] & SIG_INPROGRESS) == 0))
- {
-#if defined (JOB_CONTROL)
- save_pgrp = pipeline_pgrp;
- pipeline_pgrp = 0;
- save_pipeline (1);
-# if defined (PGRP_PIPE)
- save_pgrp_pipe (save_pipe, 1);
-# endif
- stop_making_children ();
-#endif
-
- trap_exit_value = _run_trap_internal (DEBUG_TRAP, "debug trap");
-
-#if defined (JOB_CONTROL)
- pipeline_pgrp = save_pgrp;
- restore_pipeline (1);
-# if defined (PGRP_PIPE)
- close_pgrp_pipe ();
- restore_pgrp_pipe (save_pipe);
-# endif
- if (pipeline_pgrp > 0)
- give_terminal_to (pipeline_pgrp, 1);
- notify_and_cleanup ();
-#endif
-
-#if defined (DEBUGGER)
- /* If we're in the debugger and the DEBUG trap returns 2 while we're in
- a function or sourced script, we force a `return'. */
- if (debugging_mode && trap_exit_value == 2 && return_catch_flag)
- {
- return_catch_value = trap_exit_value;
- longjmp (return_catch, 1);
- }
-#endif
- }
- return trap_exit_value;
-}
-
-void
-run_error_trap ()
-{
- if ((sigmodes[ERROR_TRAP] & SIG_TRAPPED) && ((sigmodes[ERROR_TRAP] & SIG_IGNORED) == 0) && (sigmodes[ERROR_TRAP] & SIG_INPROGRESS) == 0)
- _run_trap_internal (ERROR_TRAP, "error trap");
-}
-
-void
-run_return_trap ()
-{
- int old_exit_value;
-
-#if 0
- if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && (sigmodes[DEBUG_TRAP] & SIG_INPROGRESS))
- return;
-#endif
-
- if ((sigmodes[RETURN_TRAP] & SIG_TRAPPED) && ((sigmodes[RETURN_TRAP] & SIG_IGNORED) == 0) && (sigmodes[RETURN_TRAP] & SIG_INPROGRESS) == 0)
- {
- old_exit_value = last_command_exit_value;
- _run_trap_internal (RETURN_TRAP, "return trap");
- last_command_exit_value = old_exit_value;
- }
-}
-
-/* Run a trap set on SIGINT. This is called from throw_to_top_level (), and
- declared here to localize the trap functions. */
-void
-run_interrupt_trap ()
-{
- _run_trap_internal (SIGINT, "interrupt trap");
-}
-
-/* Free all the allocated strings in the list of traps and reset the trap
- values to the default. Intended to be called from subshells that want
- to complete work done by reset_signal_handlers upon execution of a
- subsequent `trap' command that changes a signal's disposition. We need
- to make sure that we duplicate the behavior of
- reset_or_restore_signal_handlers and not change the disposition of signals
- that are set to be ignored. */
-void
-free_trap_strings ()
-{
- register int i;
-
- for (i = 0; i < BASH_NSIG; i++)
- {
- if (trap_list[i] != (char *)IGNORE_SIG)
- free_trap_string (i);
- }
- trap_list[DEBUG_TRAP] = trap_list[EXIT_TRAP] = trap_list[ERROR_TRAP] = trap_list[RETURN_TRAP] = (char *)NULL;
-}
-
-/* Free a trap command string associated with SIG without changing signal
- disposition. Intended to be called from free_trap_strings() */
-static void
-free_trap_string (sig)
- int sig;
-{
- change_signal (sig, (char *)DEFAULT_SIG);
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-/* Reset the handler for SIG to the original value but leave the trap string
- in place. */
-static void
-reset_signal (sig)
- int sig;
-{
- set_signal_handler (sig, original_signals[sig]);
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-/* Set the handler signal SIG to the original and free any trap
- command associated with it. */
-static void
-restore_signal (sig)
- int sig;
-{
- set_signal_handler (sig, original_signals[sig]);
- change_signal (sig, (char *)DEFAULT_SIG);
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-static void
-reset_or_restore_signal_handlers (reset)
- sh_resetsig_func_t *reset;
-{
- register int i;
-
- /* Take care of the exit trap first */
- if (sigmodes[EXIT_TRAP] & SIG_TRAPPED)
- {
- sigmodes[EXIT_TRAP] &= ~SIG_TRAPPED;
- if (reset != reset_signal)
- {
- free_trap_command (EXIT_TRAP);
- trap_list[EXIT_TRAP] = (char *)NULL;
- }
- }
-
- for (i = 1; i < NSIG; i++)
- {
- if (sigmodes[i] & SIG_TRAPPED)
- {
- if (trap_list[i] == (char *)IGNORE_SIG)
- set_signal_handler (i, SIG_IGN);
- else
- (*reset) (i);
- }
- else if (sigmodes[i] & SIG_SPECIAL)
- (*reset) (i);
- }
-
- /* Command substitution and other child processes don't inherit the
- debug, error, or return traps. If we're in the debugger, and the
- `functrace' or `errtrace' options have been set, then let command
- substitutions inherit them. Let command substitution inherit the
- RETURN trap if we're in the debugger and tracing functions. */
- if (function_trace_mode == 0)
- {
- sigmodes[DEBUG_TRAP] &= ~SIG_TRAPPED;
- sigmodes[RETURN_TRAP] &= ~SIG_TRAPPED;
- }
- if (error_trace_mode == 0)
- sigmodes[ERROR_TRAP] &= ~SIG_TRAPPED;
-}
-
-/* Reset trapped signals to their original values, but don't free the
- trap strings. Called by the command substitution code and other places
- that create a "subshell environment". */
-void
-reset_signal_handlers ()
-{
- reset_or_restore_signal_handlers (reset_signal);
-}
-
-/* Reset all trapped signals to their original values. Signals set to be
- ignored with trap '' SIGNAL should be ignored, so we make sure that they
- are. Called by child processes after they are forked. */
-void
-restore_original_signals ()
-{
- reset_or_restore_signal_handlers (restore_signal);
-}
-
-/* If a trap handler exists for signal SIG, then call it; otherwise just
- return failure. Returns 1 if it called the trap handler. */
-int
-maybe_call_trap_handler (sig)
- int sig;
-{
- /* Call the trap handler for SIG if the signal is trapped and not ignored. */
- if ((sigmodes[sig] & SIG_TRAPPED) && ((sigmodes[sig] & SIG_IGNORED) == 0))
- {
- switch (sig)
- {
- case SIGINT:
- run_interrupt_trap ();
- break;
- case EXIT_TRAP:
- run_exit_trap ();
- break;
- case DEBUG_TRAP:
- run_debug_trap ();
- break;
- case ERROR_TRAP:
- run_error_trap ();
- break;
- default:
- trap_handler (sig);
- break;
- }
- return (1);
- }
- else
- return (0);
-}
-
-int
-signal_is_trapped (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_TRAPPED);
-}
-
-int
-signal_is_pending (sig)
- int sig;
-{
- return (pending_traps[sig]);
-}
-
-int
-signal_is_special (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_SPECIAL);
-}
-
-int
-signal_is_ignored (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_IGNORED);
-}
-
-int
-signal_is_hard_ignored (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_HARD_IGNORE);
-}
-
-void
-set_signal_ignored (sig)
- int sig;
-{
- sigmodes[sig] |= SIG_HARD_IGNORE;
- original_signals[sig] = SIG_IGN;
-}
-
-int
-signal_in_progress (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_INPROGRESS);
-}
+++ /dev/null
-/* trap.h -- data structures used in the trap mechanism. */
-
-/* Copyright (C) 1993-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_TRAP_H_)
-#define _TRAP_H_
-
-#include "stdc.h"
-
-#if !defined (SIG_DFL)
-#include "bashtypes.h"
-#include <signal.h>
-#endif /* SIG_DFL */
-
-#if !defined (NSIG)
-#define NSIG 64
-#endif /* !NSIG */
-
-#define NO_SIG -1
-#define DEFAULT_SIG SIG_DFL
-#define IGNORE_SIG SIG_IGN
-
-/* Special shell trap names. */
-#define DEBUG_TRAP NSIG
-#define ERROR_TRAP NSIG+1
-#define RETURN_TRAP NSIG+2
-#define EXIT_TRAP 0
-
-/* system signals plus special bash traps */
-#define BASH_NSIG NSIG+3
-
-/* Flags values for decode_signal() */
-#define DSIG_SIGPREFIX 0x01 /* don't alllow `SIG' PREFIX */
-#define DSIG_NOCASE 0x02 /* case-insensitive comparison */
-
-/* A value which can never be the target of a trap handler. */
-#define IMPOSSIBLE_TRAP_HANDLER (SigHandler *)initialize_traps
-
-#define signal_object_p(x,f) (decode_signal (x,f) != NO_SIG)
-
-#define TRAP_STRING(s) \
- (signal_is_trapped (s) && signal_is_ignored (s) == 0) ? trap_list[s] \
- : (char *)NULL
-
-extern char *trap_list[];
-
-/* Externally-visible functions declared in trap.c. */
-extern void initialize_traps __P((void));
-
-extern void run_pending_traps __P((void));
-
-extern void queue_sigchld_trap __P((int));
-extern void maybe_set_sigchld_trap __P((char *));
-extern void set_impossible_sigchld_trap __P((void));
-extern void set_sigchld_trap __P((char *));
-
-extern void set_debug_trap __P((char *));
-extern void set_error_trap __P((char *));
-extern void set_return_trap __P((char *));
-
-extern void set_sigint_trap __P((char *));
-extern void set_signal __P((int, char *));
-
-extern void restore_default_signal __P((int));
-extern void ignore_signal __P((int));
-extern int run_exit_trap __P((void));
-extern void run_trap_cleanup __P((int));
-extern int run_debug_trap __P((void));
-extern void run_error_trap __P((void));
-extern void run_return_trap __P((void));
-
-extern void free_trap_strings __P((void));
-extern void reset_signal_handlers __P((void));
-extern void restore_original_signals __P((void));
-
-extern void get_original_signal __P((int));
-extern void get_all_original_signals __P((void));
-
-extern char *signal_name __P((int));
-
-extern int decode_signal __P((char *, int));
-extern void run_interrupt_trap __P((void));
-extern int maybe_call_trap_handler __P((int));
-extern int signal_is_special __P((int));
-extern int signal_is_trapped __P((int));
-extern int signal_is_pending __P((int));
-extern int signal_is_ignored __P((int));
-extern int signal_is_hard_ignored __P((int));
-extern void set_signal_ignored __P((int));
-extern int signal_in_progress __P((int));
-
-extern int first_pending_trap __P((void));
-extern int any_signals_trapped __P((void));
-extern void check_signals_and_traps __P((void));
-
-#endif /* _TRAP_H_ */
+++ /dev/null
-/* unwind_prot.c - a simple unwind-protect system for internal variables */
-
-/* I can't stand it anymore! Please can't we just write the
- whole Unix system in lisp or something? */
-
-/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* **************************************************************** */
-/* */
-/* Unwind Protection Scheme for Bash */
-/* */
-/* **************************************************************** */
-#include "config.h"
-
-#include "bashtypes.h"
-#include "bashansi.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if STDC_HEADERS
-# include <stddef.h>
-#endif
-
-#ifndef offsetof
-# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-#endif
-
-#include "command.h"
-#include "general.h"
-#include "unwind_prot.h"
-#include "quit.h"
-#include "sig.h"
-#include "error.h" /* for internal_warning */
-
-/* Structure describing a saved variable and the value to restore it to. */
-typedef struct {
- char *variable;
- int size;
- char desired_setting[1]; /* actual size is `size' */
-} SAVED_VAR;
-
-/* If HEAD.CLEANUP is null, then ARG.V contains a tag to throw back to.
- If HEAD.CLEANUP is restore_variable, then SV.V contains the saved
- variable. Otherwise, call HEAD.CLEANUP (ARG.V) to clean up. */
-typedef union uwp {
- struct uwp_head {
- union uwp *next;
- Function *cleanup;
- } head;
- struct {
- struct uwp_head uwp_head;
- char *v;
- } arg;
- struct {
- struct uwp_head uwp_head;
- SAVED_VAR v;
- } sv;
-} UNWIND_ELT;
-
-
-static void without_interrupts __P((VFunction *, char *, char *));
-static void unwind_frame_discard_internal __P((char *, char *));
-static void unwind_frame_run_internal __P((char *, char *));
-static void add_unwind_protect_internal __P((Function *, char *));
-static void remove_unwind_protect_internal __P((char *, char *));
-static void run_unwind_protects_internal __P((char *, char *));
-static void clear_unwind_protects_internal __P((char *, char *));
-static inline void restore_variable __P((SAVED_VAR *));
-static void unwind_protect_mem_internal __P((char *, char *));
-
-static UNWIND_ELT *unwind_protect_list = (UNWIND_ELT *)NULL;
-
-#define uwpalloc(elt) (elt) = (UNWIND_ELT *)xmalloc (sizeof (UNWIND_ELT))
-#define uwpfree(elt) free(elt)
-
-/* Run a function without interrupts. This relies on the fact that the
- FUNCTION cannot change the value of interrupt_immediately. (I.e., does
- not call QUIT (). */
-static void
-without_interrupts (function, arg1, arg2)
- VFunction *function;
- char *arg1, *arg2;
-{
- int old_interrupt_immediately;
-
- old_interrupt_immediately = interrupt_immediately;
- interrupt_immediately = 0;
-
- (*function)(arg1, arg2);
-
- interrupt_immediately = old_interrupt_immediately;
-}
-
-/* Start the beginning of a region. */
-void
-begin_unwind_frame (tag)
- char *tag;
-{
- add_unwind_protect ((Function *)NULL, tag);
-}
-
-/* Discard the unwind protects back to TAG. */
-void
-discard_unwind_frame (tag)
- char *tag;
-{
- if (unwind_protect_list)
- without_interrupts (unwind_frame_discard_internal, tag, (char *)NULL);
-}
-
-/* Run the unwind protects back to TAG. */
-void
-run_unwind_frame (tag)
- char *tag;
-{
- if (unwind_protect_list)
- without_interrupts (unwind_frame_run_internal, tag, (char *)NULL);
-}
-
-/* Add the function CLEANUP with ARG to the list of unwindable things. */
-void
-add_unwind_protect (cleanup, arg)
- Function *cleanup;
- char *arg;
-{
- without_interrupts (add_unwind_protect_internal, (char *)cleanup, arg);
-}
-
-/* Remove the top unwind protect from the list. */
-void
-remove_unwind_protect ()
-{
- if (unwind_protect_list)
- without_interrupts
- (remove_unwind_protect_internal, (char *)NULL, (char *)NULL);
-}
-
-/* Run the list of cleanup functions in unwind_protect_list. */
-void
-run_unwind_protects ()
-{
- if (unwind_protect_list)
- without_interrupts
- (run_unwind_protects_internal, (char *)NULL, (char *)NULL);
-}
-
-/* Erase the unwind-protect list. If flags is 1, free the elements. */
-void
-clear_unwind_protect_list (flags)
- int flags;
-{
- char *flag;
-
- if (unwind_protect_list)
- {
- flag = flags ? "" : (char *)NULL;
- without_interrupts
- (clear_unwind_protects_internal, flag, (char *)NULL);
- }
-}
-
-int
-have_unwind_protects ()
-{
- return (unwind_protect_list != 0);
-}
-
-/* **************************************************************** */
-/* */
-/* The Actual Functions */
-/* */
-/* **************************************************************** */
-
-static void
-add_unwind_protect_internal (cleanup, arg)
- Function *cleanup;
- char *arg;
-{
- UNWIND_ELT *elt;
-
- uwpalloc (elt);
- elt->head.next = unwind_protect_list;
- elt->head.cleanup = cleanup;
- elt->arg.v = arg;
- unwind_protect_list = elt;
-}
-
-static void
-remove_unwind_protect_internal (ignore1, ignore2)
- char *ignore1, *ignore2;
-{
- UNWIND_ELT *elt;
-
- elt = unwind_protect_list;
- if (elt)
- {
- unwind_protect_list = unwind_protect_list->head.next;
- uwpfree (elt);
- }
-}
-
-static void
-run_unwind_protects_internal (ignore1, ignore2)
- char *ignore1, *ignore2;
-{
- unwind_frame_run_internal ((char *) NULL, (char *) NULL);
-}
-
-static void
-clear_unwind_protects_internal (flag, ignore)
- char *flag, *ignore;
-{
- if (flag)
- {
- while (unwind_protect_list)
- remove_unwind_protect_internal ((char *)NULL, (char *)NULL);
- }
- unwind_protect_list = (UNWIND_ELT *)NULL;
-}
-
-static void
-unwind_frame_discard_internal (tag, ignore)
- char *tag, *ignore;
-{
- UNWIND_ELT *elt;
- int found;
-
- found = 0;
- while (elt = unwind_protect_list)
- {
- unwind_protect_list = unwind_protect_list->head.next;
- if (elt->head.cleanup == 0 && (STREQ (elt->arg.v, tag)))
- {
- uwpfree (elt);
- found = 1;
- break;
- }
- else
- uwpfree (elt);
- }
-
- if (found == 0)
- internal_warning ("unwind_frame_discard: %s: frame not found", tag);
-}
-
-/* Restore the value of a variable, based on the contents of SV.
- sv->desired_setting is a block of memory SIZE bytes long holding the
- value itself. This block of memory is copied back into the variable. */
-static inline void
-restore_variable (sv)
- SAVED_VAR *sv;
-{
- FASTCOPY (sv->desired_setting, sv->variable, sv->size);
-}
-
-static void
-unwind_frame_run_internal (tag, ignore)
- char *tag, *ignore;
-{
- UNWIND_ELT *elt;
- int found;
-
- found = 0;
- while (elt = unwind_protect_list)
- {
- unwind_protect_list = elt->head.next;
-
- /* If tag, then compare. */
- if (elt->head.cleanup == 0)
- {
- if (tag && STREQ (elt->arg.v, tag))
- {
- uwpfree (elt);
- found = 1;
- break;
- }
- }
- else
- {
- if (elt->head.cleanup == (Function *) restore_variable)
- restore_variable (&elt->sv.v);
- else
- (*(elt->head.cleanup)) (elt->arg.v);
- }
-
- uwpfree (elt);
- }
- if (tag && found == 0)
- internal_warning ("unwind_frame_run: %s: frame not found", tag);
-}
-
-static void
-unwind_protect_mem_internal (var, psize)
- char *var;
- char *psize;
-{
- int size, allocated;
- UNWIND_ELT *elt;
-
- size = *(int *) psize;
- allocated = size + offsetof (UNWIND_ELT, sv.v.desired_setting[0]);
- elt = (UNWIND_ELT *)xmalloc (allocated);
- elt->head.next = unwind_protect_list;
- elt->head.cleanup = (Function *) restore_variable;
- elt->sv.v.variable = var;
- elt->sv.v.size = size;
- FASTCOPY (var, elt->sv.v.desired_setting, size);
- unwind_protect_list = elt;
-}
-
-/* Save the value of a variable so it will be restored when unwind-protects
- are run. VAR is a pointer to the variable. SIZE is the size in
- bytes of VAR. */
-void
-unwind_protect_mem (var, size)
- char *var;
- int size;
-{
- without_interrupts (unwind_protect_mem_internal, var, (char *) &size);
-}
-
-#if defined (DEBUG)
-#include <stdio.h>
-
-void
-print_unwind_protect_tags ()
-{
- UNWIND_ELT *elt;
-
- elt = unwind_protect_list;
- while (elt)
- {
- unwind_protect_list = unwind_protect_list->head.next;
- if (elt->head.cleanup == 0)
- fprintf(stderr, "tag: %s\n", elt->arg.v);
- elt = unwind_protect_list;
- }
-}
-#endif
+++ /dev/null
-/* variables.c -- Functions for hacking shell variables. */
-
-/* Copyright (C) 1987-2013 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include "posixstat.h"
-#include "posixtime.h"
-
-#if defined (__QNX__)
-# if defined (__QNXNTO__)
-# include <sys/netmgr.h>
-# else
-# include <sys/vc.h>
-# endif /* !__QNXNTO__ */
-#endif /* __QNX__ */
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include <stdio.h>
-#include "chartypes.h"
-#if defined (HAVE_PWD_H)
-# include <pwd.h>
-#endif
-#include "bashansi.h"
-#include "bashintl.h"
-
-#define NEED_XTRACE_SET_DECL
-
-#include "shell.h"
-#include "flags.h"
-#include "execute_cmd.h"
-#include "findcmd.h"
-#include "mailcheck.h"
-#include "input.h"
-#include "hashcmd.h"
-#include "pathexp.h"
-#include "alias.h"
-#include "jobs.h"
-
-#include "version.h"
-
-#include "builtins/getopt.h"
-#include "builtins/common.h"
-#include "builtins/builtext.h"
-
-#if defined (READLINE)
-# include "bashline.h"
-# include <readline/readline.h>
-#else
-# include <tilde/tilde.h>
-#endif
-
-#if defined (HISTORY)
-# include "bashhist.h"
-# include <readline/history.h>
-#endif /* HISTORY */
-
-#if defined (PROGRAMMABLE_COMPLETION)
-# include "pcomplete.h"
-#endif
-
-#define TEMPENV_HASH_BUCKETS 4 /* must be power of two */
-
-#define ifsname(s) ((s)[0] == 'I' && (s)[1] == 'F' && (s)[2] == 'S' && (s)[3] == '\0')
-
-extern char **environ;
-
-/* Variables used here and defined in other files. */
-extern int posixly_correct;
-extern int line_number, line_number_base;
-extern int subshell_environment, indirection_level, subshell_level;
-extern int build_version, patch_level;
-extern int expanding_redir;
-extern int last_command_exit_value;
-extern char *dist_version, *release_status;
-extern char *shell_name;
-extern char *primary_prompt, *secondary_prompt;
-extern char *current_host_name;
-extern sh_builtin_func_t *this_shell_builtin;
-extern SHELL_VAR *this_shell_function;
-extern char *the_printed_command_except_trap;
-extern char *this_command_name;
-extern char *command_execution_string;
-extern time_t shell_start_time;
-extern int assigning_in_environment;
-extern int executing_builtin;
-extern int funcnest_max;
-
-#if defined (READLINE)
-extern int no_line_editing;
-extern int perform_hostname_completion;
-#endif
-
-/* The list of shell variables that the user has created at the global
- scope, or that came from the environment. */
-VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL;
-
-/* The current list of shell variables, including function scopes */
-VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL;
-
-/* The list of shell functions that the user has created, or that came from
- the environment. */
-HASH_TABLE *shell_functions = (HASH_TABLE *)NULL;
-
-#if defined (DEBUGGER)
-/* The table of shell function definitions that the user defined or that
- came from the environment. */
-HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL;
-#endif
-
-/* The current variable context. This is really a count of how deep into
- executing functions we are. */
-int variable_context = 0;
-
-/* The set of shell assignments which are made only in the environment
- for a single command. */
-HASH_TABLE *temporary_env = (HASH_TABLE *)NULL;
-
-/* Set to non-zero if an assignment error occurs while putting variables
- into the temporary environment. */
-int tempenv_assign_error;
-
-/* Some funky variables which are known about specially. Here is where
- "$*", "$1", and all the cruft is kept. */
-char *dollar_vars[10];
-WORD_LIST *rest_of_args = (WORD_LIST *)NULL;
-
-/* The value of $$. */
-pid_t dollar_dollar_pid;
-
-/* Non-zero means that we have to remake EXPORT_ENV. */
-int array_needs_making = 1;
-
-/* The number of times BASH has been executed. This is set
- by initialize_variables (). */
-int shell_level = 0;
-
-/* An array which is passed to commands as their environment. It is
- manufactured from the union of the initial environment and the
- shell variables that are marked for export. */
-char **export_env = (char **)NULL;
-static int export_env_index;
-static int export_env_size;
-
-#if defined (READLINE)
-static int winsize_assignment; /* currently assigning to LINES or COLUMNS */
-#endif
-
-/* Some forward declarations. */
-static void create_variable_tables __P((void));
-
-static void set_machine_vars __P((void));
-static void set_home_var __P((void));
-static void set_shell_var __P((void));
-static char *get_bash_name __P((void));
-static void initialize_shell_level __P((void));
-static void uidset __P((void));
-#if defined (ARRAY_VARS)
-static void make_vers_array __P((void));
-#endif
-
-static SHELL_VAR *null_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
-#if defined (ARRAY_VARS)
-static SHELL_VAR *null_array_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
-#endif
-static SHELL_VAR *get_self __P((SHELL_VAR *));
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *init_dynamic_array_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
-static SHELL_VAR *init_dynamic_assoc_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
-#endif
-
-static SHELL_VAR *assign_seconds __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_seconds __P((SHELL_VAR *));
-static SHELL_VAR *init_seconds_var __P((void));
-
-static int brand __P((void));
-static void sbrand __P((unsigned long)); /* set bash random number generator. */
-static void seedrand __P((void)); /* seed generator randomly */
-static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_random __P((SHELL_VAR *));
-
-static SHELL_VAR *assign_lineno __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_lineno __P((SHELL_VAR *));
-
-static SHELL_VAR *assign_subshell __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_subshell __P((SHELL_VAR *));
-
-static SHELL_VAR *get_bashpid __P((SHELL_VAR *));
-
-#if defined (HISTORY)
-static SHELL_VAR *get_histcmd __P((SHELL_VAR *));
-#endif
-
-#if defined (READLINE)
-static SHELL_VAR *get_comp_wordbreaks __P((SHELL_VAR *));
-static SHELL_VAR *assign_comp_wordbreaks __P((SHELL_VAR *, char *, arrayind_t, char *));
-#endif
-
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
-static SHELL_VAR *assign_dirstack __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_dirstack __P((SHELL_VAR *));
-#endif
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *get_groupset __P((SHELL_VAR *));
-
-static SHELL_VAR *build_hashcmd __P((SHELL_VAR *));
-static SHELL_VAR *get_hashcmd __P((SHELL_VAR *));
-static SHELL_VAR *assign_hashcmd __P((SHELL_VAR *, char *, arrayind_t, char *));
-# if defined (ALIAS)
-static SHELL_VAR *build_aliasvar __P((SHELL_VAR *));
-static SHELL_VAR *get_aliasvar __P((SHELL_VAR *));
-static SHELL_VAR *assign_aliasvar __P((SHELL_VAR *, char *, arrayind_t, char *));
-# endif
-#endif
-
-static SHELL_VAR *get_funcname __P((SHELL_VAR *));
-static SHELL_VAR *init_funcname_var __P((void));
-
-static void initialize_dynamic_variables __P((void));
-
-static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *));
-static SHELL_VAR *new_shell_variable __P((const char *));
-static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *));
-static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int));
-
-static void dispose_variable_value __P((SHELL_VAR *));
-static void free_variable_hash_data __P((PTR_T));
-
-static VARLIST *vlist_alloc __P((int));
-static VARLIST *vlist_realloc __P((VARLIST *, int));
-static void vlist_add __P((VARLIST *, SHELL_VAR *, int));
-
-static void flatten __P((HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int));
-
-static int qsort_var_comp __P((SHELL_VAR **, SHELL_VAR **));
-
-static SHELL_VAR **vapply __P((sh_var_map_func_t *));
-static SHELL_VAR **fapply __P((sh_var_map_func_t *));
-
-static int visible_var __P((SHELL_VAR *));
-static int visible_and_exported __P((SHELL_VAR *));
-static int export_environment_candidate __P((SHELL_VAR *));
-static int local_and_exported __P((SHELL_VAR *));
-static int variable_in_context __P((SHELL_VAR *));
-#if defined (ARRAY_VARS)
-static int visible_array_vars __P((SHELL_VAR *));
-#endif
-
-static SHELL_VAR *find_nameref_at_context __P((SHELL_VAR *, VAR_CONTEXT *));
-static SHELL_VAR *find_variable_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **));
-static SHELL_VAR *find_variable_last_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **));
-
-static SHELL_VAR *bind_tempenv_variable __P((const char *, char *));
-static void push_temp_var __P((PTR_T));
-static void propagate_temp_var __P((PTR_T));
-static void dispose_temporary_env __P((sh_free_func_t *));
-
-static inline char *mk_env_string __P((const char *, const char *));
-static char **make_env_array_from_var_list __P((SHELL_VAR **));
-static char **make_var_export_array __P((VAR_CONTEXT *));
-static char **make_func_export_array __P((void));
-static void add_temp_array_to_env __P((char **, int, int));
-
-static int n_shell_variables __P((void));
-static int set_context __P((SHELL_VAR *));
-
-static void push_func_var __P((PTR_T));
-static void push_exported_var __P((PTR_T));
-
-static inline int find_special_var __P((const char *));
-
-static void
-create_variable_tables ()
-{
- if (shell_variables == 0)
- {
- shell_variables = global_variables = new_var_context ((char *)NULL, 0);
- shell_variables->scope = 0;
- shell_variables->table = hash_create (0);
- }
-
- if (shell_functions == 0)
- shell_functions = hash_create (0);
-
-#if defined (DEBUGGER)
- if (shell_function_defs == 0)
- shell_function_defs = hash_create (0);
-#endif
-}
-
-/* Initialize the shell variables from the current environment.
- If PRIVMODE is nonzero, don't import functions from ENV or
- parse $SHELLOPTS. */
-void
-initialize_shell_variables (env, privmode)
- char **env;
- int privmode;
-{
- char *name, *string, *temp_string;
- int c, char_index, string_index, string_length, ro;
- SHELL_VAR *temp_var;
-
- create_variable_tables ();
-
- for (string_index = 0; string = env[string_index++]; )
- {
- char_index = 0;
- name = string;
- while ((c = *string++) && c != '=')
- ;
- if (string[-1] == '=')
- char_index = string - name - 1;
-
- /* If there are weird things in the environment, like `=xxx' or a
- string without an `=', just skip them. */
- if (char_index == 0)
- continue;
-
- /* ASSERT(name[char_index] == '=') */
- name[char_index] = '\0';
- /* Now, name = env variable name, string = env variable value, and
- char_index == strlen (name) */
-
- temp_var = (SHELL_VAR *)NULL;
-
- /* If exported function, define it now. Don't import functions from
- the environment in privileged mode. */
- if (privmode == 0 && read_but_dont_execute == 0 && STREQN ("() {", string, 4))
- {
- string_length = strlen (string);
- temp_string = (char *)xmalloc (3 + string_length + char_index);
-
- strcpy (temp_string, name);
- temp_string[char_index] = ' ';
- strcpy (temp_string + char_index + 1, string);
-
- if (posixly_correct == 0 || legal_identifier (name))
- parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
-
- /* Ancient backwards compatibility. Old versions of bash exported
- functions like name()=() {...} */
- if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
- name[char_index - 2] = '\0';
-
- if (temp_var = find_function (name))
- {
- VSETATTR (temp_var, (att_exported|att_imported));
- array_needs_making = 1;
- }
- else
- {
- if (temp_var = bind_variable (name, string, 0))
- {
- VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
- array_needs_making = 1;
- }
- last_command_exit_value = 1;
- report_error (_("error importing function definition for `%s'"), name);
- }
-
- /* ( */
- if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
- name[char_index - 2] = '('; /* ) */
- }
-#if defined (ARRAY_VARS)
-# if ARRAY_EXPORT
- /* Array variables may not yet be exported. */
- else if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')')
- {
- string_length = 1;
- temp_string = extract_array_assignment_list (string, &string_length);
- temp_var = assign_array_from_string (name, temp_string);
- FREE (temp_string);
- VSETATTR (temp_var, (att_exported | att_imported));
- array_needs_making = 1;
- }
-# endif /* ARRAY_EXPORT */
-#endif
-#if 0
- else if (legal_identifier (name))
-#else
- else
-#endif
- {
- ro = 0;
- if (posixly_correct && STREQ (name, "SHELLOPTS"))
- {
- temp_var = find_variable ("SHELLOPTS");
- ro = temp_var && readonly_p (temp_var);
- if (temp_var)
- VUNSETATTR (temp_var, att_readonly);
- }
- temp_var = bind_variable (name, string, 0);
- if (temp_var)
- {
- if (legal_identifier (name))
- VSETATTR (temp_var, (att_exported | att_imported));
- else
- VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
- if (ro)
- VSETATTR (temp_var, att_readonly);
- array_needs_making = 1;
- }
- }
-
- name[char_index] = '=';
- /* temp_var can be NULL if it was an exported function with a syntax
- error (a different bug, but it still shouldn't dump core). */
- if (temp_var && function_p (temp_var) == 0) /* XXX not yet */
- {
- CACHE_IMPORTSTR (temp_var, name);
- }
- }
-
- set_pwd ();
-
- /* Set up initial value of $_ */
- temp_var = set_if_not ("_", dollar_vars[0]);
-
- /* Remember this pid. */
- dollar_dollar_pid = getpid ();
-
- /* Now make our own defaults in case the vars that we think are
- important are missing. */
- temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE);
-#if 0
- set_auto_export (temp_var); /* XXX */
-#endif
-
- temp_var = set_if_not ("TERM", "dumb");
-#if 0
- set_auto_export (temp_var); /* XXX */
-#endif
-
-#if defined (__QNX__)
- /* set node id -- don't import it from the environment */
- {
- char node_name[22];
-# if defined (__QNXNTO__)
- netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name));
-# else
- qnx_nidtostr (getnid (), node_name, sizeof (node_name));
-# endif
- temp_var = bind_variable ("NODE", node_name, 0);
- set_auto_export (temp_var);
- }
-#endif
-
- /* set up the prompts. */
- if (interactive_shell)
- {
-#if defined (PROMPT_STRING_DECODE)
- set_if_not ("PS1", primary_prompt);
-#else
- if (current_user.uid == -1)
- get_current_user_info ();
- set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt);
-#endif
- set_if_not ("PS2", secondary_prompt);
- }
- set_if_not ("PS4", "+ ");
-
- /* Don't allow IFS to be imported from the environment. */
- temp_var = bind_variable ("IFS", " \t\n", 0);
- setifs (temp_var);
-
- /* Magic machine types. Pretty convenient. */
- set_machine_vars ();
-
- /* Default MAILCHECK for interactive shells. Defer the creation of a
- default MAILPATH until the startup files are read, because MAIL
- names a mail file if MAILPATH is not set, and we should provide a
- default only if neither is set. */
- if (interactive_shell)
- {
- temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60");
- VSETATTR (temp_var, att_integer);
- }
-
- /* Do some things with shell level. */
- initialize_shell_level ();
-
- set_ppid ();
-
- /* Initialize the `getopts' stuff. */
- temp_var = bind_variable ("OPTIND", "1", 0);
- VSETATTR (temp_var, att_integer);
- getopts_reset (0);
- bind_variable ("OPTERR", "1", 0);
- sh_opterr = 1;
-
- if (login_shell == 1 && posixly_correct == 0)
- set_home_var ();
-
- /* Get the full pathname to THIS shell, and set the BASH variable
- to it. */
- name = get_bash_name ();
- temp_var = bind_variable ("BASH", name, 0);
- free (name);
-
- /* Make the exported environment variable SHELL be the user's login
- shell. Note that the `tset' command looks at this variable
- to determine what style of commands to output; if it ends in "csh",
- then C-shell commands are output, else Bourne shell commands. */
- set_shell_var ();
-
- /* Make a variable called BASH_VERSION which contains the version info. */
- bind_variable ("BASH_VERSION", shell_version_string (), 0);
-#if defined (ARRAY_VARS)
- make_vers_array ();
-#endif
-
- if (command_execution_string)
- bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0);
-
- /* Find out if we're supposed to be in Posix.2 mode via an
- environment variable. */
- temp_var = find_variable ("POSIXLY_CORRECT");
- if (!temp_var)
- temp_var = find_variable ("POSIX_PEDANTIC");
- if (temp_var && imported_p (temp_var))
- sv_strict_posix (temp_var->name);
-
-#if defined (HISTORY)
- /* Set history variables to defaults, and then do whatever we would
- do if the variable had just been set. Do this only in the case
- that we are remembering commands on the history list. */
- if (remember_on_history)
- {
- name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0);
-
- set_if_not ("HISTFILE", name);
- free (name);
- }
-#endif /* HISTORY */
-
- /* Seed the random number generator. */
- seedrand ();
-
- /* Handle some "special" variables that we may have inherited from a
- parent shell. */
- if (interactive_shell)
- {
- temp_var = find_variable ("IGNOREEOF");
- if (!temp_var)
- temp_var = find_variable ("ignoreeof");
- if (temp_var && imported_p (temp_var))
- sv_ignoreeof (temp_var->name);
- }
-
-#if defined (HISTORY)
- if (interactive_shell && remember_on_history)
- {
- sv_history_control ("HISTCONTROL");
- sv_histignore ("HISTIGNORE");
- sv_histtimefmt ("HISTTIMEFORMAT");
- }
-#endif /* HISTORY */
-
-#if defined (READLINE) && defined (STRICT_POSIX)
- /* POSIXLY_CORRECT will only be 1 here if the shell was compiled
- -DSTRICT_POSIX */
- if (interactive_shell && posixly_correct && no_line_editing == 0)
- rl_prefer_env_winsize = 1;
-#endif /* READLINE && STRICT_POSIX */
-
- /*
- * 24 October 2001
- *
- * I'm tired of the arguing and bug reports. Bash now leaves SSH_CLIENT
- * and SSH2_CLIENT alone. I'm going to rely on the shell_level check in
- * isnetconn() to avoid running the startup files more often than wanted.
- * That will, of course, only work if the user's login shell is bash, so
- * I've made that behavior conditional on SSH_SOURCE_BASHRC being defined
- * in config-top.h.
- */
-#if 0
- temp_var = find_variable ("SSH_CLIENT");
- if (temp_var && imported_p (temp_var))
- {
- VUNSETATTR (temp_var, att_exported);
- array_needs_making = 1;
- }
- temp_var = find_variable ("SSH2_CLIENT");
- if (temp_var && imported_p (temp_var))
- {
- VUNSETATTR (temp_var, att_exported);
- array_needs_making = 1;
- }
-#endif
-
- /* Get the user's real and effective user ids. */
- uidset ();
-
- temp_var = find_variable ("BASH_XTRACEFD");
- if (temp_var && imported_p (temp_var))
- sv_xtracefd (temp_var->name);
-
- /* Initialize the dynamic variables, and seed their values. */
- initialize_dynamic_variables ();
-}
-
-/* **************************************************************** */
-/* */
-/* Setting values for special shell variables */
-/* */
-/* **************************************************************** */
-
-static void
-set_machine_vars ()
-{
- SHELL_VAR *temp_var;
-
- temp_var = set_if_not ("HOSTTYPE", HOSTTYPE);
- temp_var = set_if_not ("OSTYPE", OSTYPE);
- temp_var = set_if_not ("MACHTYPE", MACHTYPE);
-
- temp_var = set_if_not ("HOSTNAME", current_host_name);
-}
-
-/* Set $HOME to the information in the password file if we didn't get
- it from the environment. */
-
-/* This function is not static so the tilde and readline libraries can
- use it. */
-char *
-sh_get_home_dir ()
-{
- if (current_user.home_dir == 0)
- get_current_user_info ();
- return current_user.home_dir;
-}
-
-static void
-set_home_var ()
-{
- SHELL_VAR *temp_var;
-
- temp_var = find_variable ("HOME");
- if (temp_var == 0)
- temp_var = bind_variable ("HOME", sh_get_home_dir (), 0);
-#if 0
- VSETATTR (temp_var, att_exported);
-#endif
-}
-
-/* Set $SHELL to the user's login shell if it is not already set. Call
- get_current_user_info if we haven't already fetched the shell. */
-static void
-set_shell_var ()
-{
- SHELL_VAR *temp_var;
-
- temp_var = find_variable ("SHELL");
- if (temp_var == 0)
- {
- if (current_user.shell == 0)
- get_current_user_info ();
- temp_var = bind_variable ("SHELL", current_user.shell, 0);
- }
-#if 0
- VSETATTR (temp_var, att_exported);
-#endif
-}
-
-static char *
-get_bash_name ()
-{
- char *name;
-
- if ((login_shell == 1) && RELPATH(shell_name))
- {
- if (current_user.shell == 0)
- get_current_user_info ();
- name = savestring (current_user.shell);
- }
- else if (ABSPATH(shell_name))
- name = savestring (shell_name);
- else if (shell_name[0] == '.' && shell_name[1] == '/')
- {
- /* Fast path for common case. */
- char *cdir;
- int len;
-
- cdir = get_string_value ("PWD");
- if (cdir)
- {
- len = strlen (cdir);
- name = (char *)xmalloc (len + strlen (shell_name) + 1);
- strcpy (name, cdir);
- strcpy (name + len, shell_name + 1);
- }
- else
- name = savestring (shell_name);
- }
- else
- {
- char *tname;
- int s;
-
- tname = find_user_command (shell_name);
-
- if (tname == 0)
- {
- /* Try the current directory. If there is not an executable
- there, just punt and use the login shell. */
- s = file_status (shell_name);
- if (s & FS_EXECABLE)
- {
- tname = make_absolute (shell_name, get_string_value ("PWD"));
- if (*shell_name == '.')
- {
- name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
- if (name == 0)
- name = tname;
- else
- free (tname);
- }
- else
- name = tname;
- }
- else
- {
- if (current_user.shell == 0)
- get_current_user_info ();
- name = savestring (current_user.shell);
- }
- }
- else
- {
- name = full_pathname (tname);
- free (tname);
- }
- }
-
- return (name);
-}
-
-void
-adjust_shell_level (change)
- int change;
-{
- char new_level[5], *old_SHLVL;
- intmax_t old_level;
- SHELL_VAR *temp_var;
-
- old_SHLVL = get_string_value ("SHLVL");
- if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0)
- old_level = 0;
-
- shell_level = old_level + change;
- if (shell_level < 0)
- shell_level = 0;
- else if (shell_level > 1000)
- {
- internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level);
- shell_level = 1;
- }
-
- /* We don't need the full generality of itos here. */
- if (shell_level < 10)
- {
- new_level[0] = shell_level + '0';
- new_level[1] = '\0';
- }
- else if (shell_level < 100)
- {
- new_level[0] = (shell_level / 10) + '0';
- new_level[1] = (shell_level % 10) + '0';
- new_level[2] = '\0';
- }
- else if (shell_level < 1000)
- {
- new_level[0] = (shell_level / 100) + '0';
- old_level = shell_level % 100;
- new_level[1] = (old_level / 10) + '0';
- new_level[2] = (old_level % 10) + '0';
- new_level[3] = '\0';
- }
-
- temp_var = bind_variable ("SHLVL", new_level, 0);
- set_auto_export (temp_var);
-}
-
-static void
-initialize_shell_level ()
-{
- adjust_shell_level (1);
-}
-
-/* If we got PWD from the environment, update our idea of the current
- working directory. In any case, make sure that PWD exists before
- checking it. It is possible for getcwd () to fail on shell startup,
- and in that case, PWD would be undefined. If this is an interactive
- login shell, see if $HOME is the current working directory, and if
- that's not the same string as $PWD, set PWD=$HOME. */
-
-void
-set_pwd ()
-{
- SHELL_VAR *temp_var, *home_var;
- char *temp_string, *home_string;
-
- home_var = find_variable ("HOME");
- home_string = home_var ? value_cell (home_var) : (char *)NULL;
-
- temp_var = find_variable ("PWD");
- if (temp_var && imported_p (temp_var) &&
- (temp_string = value_cell (temp_var)) &&
- same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL))
- set_working_directory (temp_string);
- else if (home_string && interactive_shell && login_shell &&
- same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL))
- {
- set_working_directory (home_string);
- temp_var = bind_variable ("PWD", home_string, 0);
- set_auto_export (temp_var);
- }
- else
- {
- temp_string = get_working_directory ("shell-init");
- if (temp_string)
- {
- temp_var = bind_variable ("PWD", temp_string, 0);
- set_auto_export (temp_var);
- free (temp_string);
- }
- }
-
- /* According to the Single Unix Specification, v2, $OLDPWD is an
- `environment variable' and therefore should be auto-exported.
- Make a dummy invisible variable for OLDPWD, and mark it as exported. */
- temp_var = bind_variable ("OLDPWD", (char *)NULL, 0);
- VSETATTR (temp_var, (att_exported | att_invisible));
-}
-
-/* Make a variable $PPID, which holds the pid of the shell's parent. */
-void
-set_ppid ()
-{
- char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name;
- SHELL_VAR *temp_var;
-
- name = inttostr (getppid (), namebuf, sizeof(namebuf));
- temp_var = find_variable ("PPID");
- if (temp_var)
- VUNSETATTR (temp_var, (att_readonly | att_exported));
- temp_var = bind_variable ("PPID", name, 0);
- VSETATTR (temp_var, (att_readonly | att_integer));
-}
-
-static void
-uidset ()
-{
- char buff[INT_STRLEN_BOUND(uid_t) + 1], *b;
- register SHELL_VAR *v;
-
- b = inttostr (current_user.uid, buff, sizeof (buff));
- v = find_variable ("UID");
- if (v == 0)
- {
- v = bind_variable ("UID", b, 0);
- VSETATTR (v, (att_readonly | att_integer));
- }
-
- if (current_user.euid != current_user.uid)
- b = inttostr (current_user.euid, buff, sizeof (buff));
-
- v = find_variable ("EUID");
- if (v == 0)
- {
- v = bind_variable ("EUID", b, 0);
- VSETATTR (v, (att_readonly | att_integer));
- }
-}
-
-#if defined (ARRAY_VARS)
-static void
-make_vers_array ()
-{
- SHELL_VAR *vv;
- ARRAY *av;
- char *s, d[32], b[INT_STRLEN_BOUND(int) + 1];
-
- unbind_variable ("BASH_VERSINFO");
-
- vv = make_new_array_variable ("BASH_VERSINFO");
- av = array_cell (vv);
- strcpy (d, dist_version);
- s = strchr (d, '.');
- if (s)
- *s++ = '\0';
- array_insert (av, 0, d);
- array_insert (av, 1, s);
- s = inttostr (patch_level, b, sizeof (b));
- array_insert (av, 2, s);
- s = inttostr (build_version, b, sizeof (b));
- array_insert (av, 3, s);
- array_insert (av, 4, release_status);
- array_insert (av, 5, MACHTYPE);
-
- VSETATTR (vv, att_readonly);
-}
-#endif /* ARRAY_VARS */
-
-/* Set the environment variables $LINES and $COLUMNS in response to
- a window size change. */
-void
-sh_set_lines_and_columns (lines, cols)
- int lines, cols;
-{
- char val[INT_STRLEN_BOUND(int) + 1], *v;
-
-#if defined (READLINE)
- /* If we are currently assigning to LINES or COLUMNS, don't do anything. */
- if (winsize_assignment)
- return;
-#endif
-
- v = inttostr (lines, val, sizeof (val));
- bind_variable ("LINES", v, 0);
-
- v = inttostr (cols, val, sizeof (val));
- bind_variable ("COLUMNS", v, 0);
-}
-
-/* **************************************************************** */
-/* */
-/* Printing variables and values */
-/* */
-/* **************************************************************** */
-
-/* Print LIST (a list of shell variables) to stdout in such a way that
- they can be read back in. */
-void
-print_var_list (list)
- register SHELL_VAR **list;
-{
- register int i;
- register SHELL_VAR *var;
-
- for (i = 0; list && (var = list[i]); i++)
- if (invisible_p (var) == 0)
- print_assignment (var);
-}
-
-/* Print LIST (a list of shell functions) to stdout in such a way that
- they can be read back in. */
-void
-print_func_list (list)
- register SHELL_VAR **list;
-{
- register int i;
- register SHELL_VAR *var;
-
- for (i = 0; list && (var = list[i]); i++)
- {
- printf ("%s ", var->name);
- print_var_function (var);
- printf ("\n");
- }
-}
-
-/* Print the value of a single SHELL_VAR. No newline is
- output, but the variable is printed in such a way that
- it can be read back in. */
-void
-print_assignment (var)
- SHELL_VAR *var;
-{
- if (var_isset (var) == 0)
- return;
-
- if (function_p (var))
- {
- printf ("%s", var->name);
- print_var_function (var);
- printf ("\n");
- }
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- print_array_assignment (var, 0);
- else if (assoc_p (var))
- print_assoc_assignment (var, 0);
-#endif /* ARRAY_VARS */
- else
- {
- printf ("%s=", var->name);
- print_var_value (var, 1);
- printf ("\n");
- }
-}
-
-/* Print the value cell of VAR, a shell variable. Do not print
- the name, nor leading/trailing newline. If QUOTE is non-zero,
- and the value contains shell metacharacters, quote the value
- in such a way that it can be read back in. */
-void
-print_var_value (var, quote)
- SHELL_VAR *var;
- int quote;
-{
- char *t;
-
- if (var_isset (var) == 0)
- return;
-
- if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var)))
- {
- t = ansic_quote (value_cell (var), 0, (int *)0);
- printf ("%s", t);
- free (t);
- }
- else if (quote && sh_contains_shell_metas (value_cell (var)))
- {
- t = sh_single_quote (value_cell (var));
- printf ("%s", t);
- free (t);
- }
- else
- printf ("%s", value_cell (var));
-}
-
-/* Print the function cell of VAR, a shell variable. Do not
- print the name, nor leading/trailing newline. */
-void
-print_var_function (var)
- SHELL_VAR *var;
-{
- char *x;
-
- if (function_p (var) && var_isset (var))
- {
- x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL);
- printf ("%s", x);
- }
-}
-
-/* **************************************************************** */
-/* */
-/* Dynamic Variables */
-/* */
-/* **************************************************************** */
-
-/* DYNAMIC VARIABLES
-
- These are variables whose values are generated anew each time they are
- referenced. These are implemented using a pair of function pointers
- in the struct variable: assign_func, which is called from bind_variable
- and, if arrays are compiled into the shell, some of the functions in
- arrayfunc.c, and dynamic_value, which is called from find_variable.
-
- assign_func is called from bind_variable_internal, if
- bind_variable_internal discovers that the variable being assigned to
- has such a function. The function is called as
- SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind)
- and the (SHELL_VAR *)temp is returned as the value of bind_variable. It
- is usually ENTRY (self). IND is an index for an array variable, and
- unused otherwise.
-
- dynamic_value is called from find_variable_internal to return a `new'
- value for the specified dynamic varible. If this function is NULL,
- the variable is treated as a `normal' shell variable. If it is not,
- however, then this function is called like this:
- tempvar = (*(var->dynamic_value)) (var);
-
- Sometimes `tempvar' will replace the value of `var'. Other times, the
- shell will simply use the string value. Pretty object-oriented, huh?
-
- Be warned, though: if you `unset' a special variable, it loses its
- special meaning, even if you subsequently set it.
-
- The special assignment code would probably have been better put in
- subst.c: do_assignment_internal, in the same style as
- stupidly_hack_special_variables, but I wanted the changes as
- localized as possible. */
-
-#define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \
- do \
- { \
- v = bind_variable (var, (val), 0); \
- v->dynamic_value = gfunc; \
- v->assign_func = afunc; \
- } \
- while (0)
-
-#define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \
- do \
- { \
- v = make_new_array_variable (var); \
- v->dynamic_value = gfunc; \
- v->assign_func = afunc; \
- } \
- while (0)
-
-#define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \
- do \
- { \
- v = make_new_assoc_variable (var); \
- v->dynamic_value = gfunc; \
- v->assign_func = afunc; \
- } \
- while (0)
-
-static SHELL_VAR *
-null_assign (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- return (self);
-}
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *
-null_array_assign (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- return (self);
-}
-#endif
-
-/* Degenerate `dynamic_value' function; just returns what's passed without
- manipulation. */
-static SHELL_VAR *
-get_self (self)
- SHELL_VAR *self;
-{
- return (self);
-}
-
-#if defined (ARRAY_VARS)
-/* A generic dynamic array variable initializer. Intialize array variable
- NAME with dynamic value function GETFUNC and assignment function SETFUNC. */
-static SHELL_VAR *
-init_dynamic_array_var (name, getfunc, setfunc, attrs)
- char *name;
- sh_var_value_func_t *getfunc;
- sh_var_assign_func_t *setfunc;
- int attrs;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v)
- return (v);
- INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc);
- if (attrs)
- VSETATTR (v, attrs);
- return v;
-}
-
-static SHELL_VAR *
-init_dynamic_assoc_var (name, getfunc, setfunc, attrs)
- char *name;
- sh_var_value_func_t *getfunc;
- sh_var_assign_func_t *setfunc;
- int attrs;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v)
- return (v);
- INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc);
- if (attrs)
- VSETATTR (v, attrs);
- return v;
-}
-#endif
-
-/* The value of $SECONDS. This is the number of seconds since shell
- invocation, or, the number of seconds since the last assignment + the
- value of the last assignment. */
-static intmax_t seconds_value_assigned;
-
-static SHELL_VAR *
-assign_seconds (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- if (legal_number (value, &seconds_value_assigned) == 0)
- seconds_value_assigned = 0;
- shell_start_time = NOW;
- return (self);
-}
-
-static SHELL_VAR *
-get_seconds (var)
- SHELL_VAR *var;
-{
- time_t time_since_start;
- char *p;
-
- time_since_start = NOW - shell_start_time;
- p = itos(seconds_value_assigned + time_since_start);
-
- FREE (value_cell (var));
-
- VSETATTR (var, att_integer);
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-init_seconds_var ()
-{
- SHELL_VAR *v;
-
- v = find_variable ("SECONDS");
- if (v)
- {
- if (legal_number (value_cell(v), &seconds_value_assigned) == 0)
- seconds_value_assigned = 0;
- }
- INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds);
- return v;
-}
-
-/* The random number seed. You can change this by setting RANDOM. */
-static unsigned long rseed = 1;
-static int last_random_value;
-static int seeded_subshell = 0;
-
-/* A linear congruential random number generator based on the example
- one in the ANSI C standard. This one isn't very good, but a more
- complicated one is overkill. */
-
-/* Returns a pseudo-random number between 0 and 32767. */
-static int
-brand ()
-{
- /* From "Random number generators: good ones are hard to find",
- Park and Miller, Communications of the ACM, vol. 31, no. 10,
- October 1988, p. 1195. filtered through FreeBSD */
- long h, l;
-
- /* Can't seed with 0. */
- if (rseed == 0)
- rseed = 123459876;
- h = rseed / 127773;
- l = rseed % 127773;
- rseed = 16807 * l - 2836 * h;
-#if 0
- if (rseed < 0)
- rseed += 0x7fffffff;
-#endif
- return ((unsigned int)(rseed & 32767)); /* was % 32768 */
-}
-
-/* Set the random number generator seed to SEED. */
-static void
-sbrand (seed)
- unsigned long seed;
-{
- rseed = seed;
- last_random_value = 0;
-}
-
-static void
-seedrand ()
-{
- struct timeval tv;
-
- gettimeofday (&tv, NULL);
- sbrand (tv.tv_sec ^ tv.tv_usec ^ getpid ());
-}
-
-static SHELL_VAR *
-assign_random (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- sbrand (strtoul (value, (char **)NULL, 10));
- if (subshell_environment)
- seeded_subshell = getpid ();
- return (self);
-}
-
-int
-get_random_number ()
-{
- int rv, pid;
-
- /* Reset for command and process substitution. */
- pid = getpid ();
- if (subshell_environment && seeded_subshell != pid)
- {
- seedrand ();
- seeded_subshell = pid;
- }
-
- do
- rv = brand ();
- while (rv == last_random_value);
- return rv;
-}
-
-static SHELL_VAR *
-get_random (var)
- SHELL_VAR *var;
-{
- int rv;
- char *p;
-
- rv = get_random_number ();
- last_random_value = rv;
- p = itos (rv);
-
- FREE (value_cell (var));
-
- VSETATTR (var, att_integer);
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-assign_lineno (var, value, unused, key)
- SHELL_VAR *var;
- char *value;
- arrayind_t unused;
- char *key;
-{
- intmax_t new_value;
-
- if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
- new_value = 0;
- line_number = line_number_base = new_value;
- return var;
-}
-
-/* Function which returns the current line number. */
-static SHELL_VAR *
-get_lineno (var)
- SHELL_VAR *var;
-{
- char *p;
- int ln;
-
- ln = executing_line_number ();
- p = itos (ln);
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-assign_subshell (var, value, unused, key)
- SHELL_VAR *var;
- char *value;
- arrayind_t unused;
- char *key;
-{
- intmax_t new_value;
-
- if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
- new_value = 0;
- subshell_level = new_value;
- return var;
-}
-
-static SHELL_VAR *
-get_subshell (var)
- SHELL_VAR *var;
-{
- char *p;
-
- p = itos (subshell_level);
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-get_bashpid (var)
- SHELL_VAR *var;
-{
- int pid;
- char *p;
-
- pid = getpid ();
- p = itos (pid);
-
- FREE (value_cell (var));
- VSETATTR (var, att_integer|att_readonly);
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-get_bash_command (var)
- SHELL_VAR *var;
-{
- char *p;
-
- if (the_printed_command_except_trap)
- p = savestring (the_printed_command_except_trap);
- else
- {
- p = (char *)xmalloc (1);
- p[0] = '\0';
- }
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-
-#if defined (HISTORY)
-static SHELL_VAR *
-get_histcmd (var)
- SHELL_VAR *var;
-{
- char *p;
-
- p = itos (history_number ());
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-#endif
-
-#if defined (READLINE)
-/* When this function returns, VAR->value points to malloced memory. */
-static SHELL_VAR *
-get_comp_wordbreaks (var)
- SHELL_VAR *var;
-{
- /* If we don't have anything yet, assign a default value. */
- if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0)
- enable_hostname_completion (perform_hostname_completion);
-
- FREE (value_cell (var));
- var_setvalue (var, savestring (rl_completer_word_break_characters));
-
- return (var);
-}
-
-/* When this function returns, rl_completer_word_break_characters points to
- malloced memory. */
-static SHELL_VAR *
-assign_comp_wordbreaks (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- if (rl_completer_word_break_characters &&
- rl_completer_word_break_characters != rl_basic_word_break_characters)
- free (rl_completer_word_break_characters);
-
- rl_completer_word_break_characters = savestring (value);
- return self;
-}
-#endif /* READLINE */
-
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
-static SHELL_VAR *
-assign_dirstack (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- set_dirstack_element (ind, 1, value);
- return self;
-}
-
-static SHELL_VAR *
-get_dirstack (self)
- SHELL_VAR *self;
-{
- ARRAY *a;
- WORD_LIST *l;
-
- l = get_directory_stack (0);
- a = array_from_word_list (l);
- array_dispose (array_cell (self));
- dispose_words (l);
- var_setarray (self, a);
- return self;
-}
-#endif /* PUSHD AND POPD && ARRAY_VARS */
-
-#if defined (ARRAY_VARS)
-/* We don't want to initialize the group set with a call to getgroups()
- unless we're asked to, but we only want to do it once. */
-static SHELL_VAR *
-get_groupset (self)
- SHELL_VAR *self;
-{
- register int i;
- int ng;
- ARRAY *a;
- static char **group_set = (char **)NULL;
-
- if (group_set == 0)
- {
- group_set = get_group_list (&ng);
- a = array_cell (self);
- for (i = 0; i < ng; i++)
- array_insert (a, i, group_set[i]);
- }
- return (self);
-}
-
-static SHELL_VAR *
-build_hashcmd (self)
- SHELL_VAR *self;
-{
- HASH_TABLE *h;
- int i;
- char *k, *v;
- BUCKET_CONTENTS *item;
-
- h = assoc_cell (self);
- if (h)
- assoc_dispose (h);
-
- if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0)
- {
- var_setvalue (self, (char *)NULL);
- return self;
- }
-
- h = assoc_create (hashed_filenames->nbuckets);
- for (i = 0; i < hashed_filenames->nbuckets; i++)
- {
- for (item = hash_items (i, hashed_filenames); item; item = item->next)
- {
- k = savestring (item->key);
- v = pathdata(item)->path;
- assoc_insert (h, k, v);
- }
- }
-
- var_setvalue (self, (char *)h);
- return self;
-}
-
-static SHELL_VAR *
-get_hashcmd (self)
- SHELL_VAR *self;
-{
- build_hashcmd (self);
- return (self);
-}
-
-static SHELL_VAR *
-assign_hashcmd (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- phash_insert (key, value, 0, 0);
- return (build_hashcmd (self));
-}
-
-#if defined (ALIAS)
-static SHELL_VAR *
-build_aliasvar (self)
- SHELL_VAR *self;
-{
- HASH_TABLE *h;
- int i;
- char *k, *v;
- BUCKET_CONTENTS *item;
-
- h = assoc_cell (self);
- if (h)
- assoc_dispose (h);
-
- if (aliases == 0 || HASH_ENTRIES (aliases) == 0)
- {
- var_setvalue (self, (char *)NULL);
- return self;
- }
-
- h = assoc_create (aliases->nbuckets);
- for (i = 0; i < aliases->nbuckets; i++)
- {
- for (item = hash_items (i, aliases); item; item = item->next)
- {
- k = savestring (item->key);
- v = ((alias_t *)(item->data))->value;
- assoc_insert (h, k, v);
- }
- }
-
- var_setvalue (self, (char *)h);
- return self;
-}
-
-static SHELL_VAR *
-get_aliasvar (self)
- SHELL_VAR *self;
-{
- build_aliasvar (self);
- return (self);
-}
-
-static SHELL_VAR *
-assign_aliasvar (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- add_alias (key, value);
- return (build_aliasvar (self));
-}
-#endif /* ALIAS */
-
-#endif /* ARRAY_VARS */
-
-/* If ARRAY_VARS is not defined, this just returns the name of any
- currently-executing function. If we have arrays, it's a call stack. */
-static SHELL_VAR *
-get_funcname (self)
- SHELL_VAR *self;
-{
-#if ! defined (ARRAY_VARS)
- char *t;
- if (variable_context && this_shell_function)
- {
- FREE (value_cell (self));
- t = savestring (this_shell_function->name);
- var_setvalue (self, t);
- }
-#endif
- return (self);
-}
-
-void
-make_funcname_visible (on_or_off)
- int on_or_off;
-{
- SHELL_VAR *v;
-
- v = find_variable ("FUNCNAME");
- if (v == 0 || v->dynamic_value == 0)
- return;
-
- if (on_or_off)
- VUNSETATTR (v, att_invisible);
- else
- VSETATTR (v, att_invisible);
-}
-
-static SHELL_VAR *
-init_funcname_var ()
-{
- SHELL_VAR *v;
-
- v = find_variable ("FUNCNAME");
- if (v)
- return v;
-#if defined (ARRAY_VARS)
- INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign);
-#else
- INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign);
-#endif
- VSETATTR (v, att_invisible|att_noassign);
- return v;
-}
-
-static void
-initialize_dynamic_variables ()
-{
- SHELL_VAR *v;
-
- v = init_seconds_var ();
-
- INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL);
- INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell);
-
- INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random);
- VSETATTR (v, att_integer);
- INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno);
- VSETATTR (v, att_integer);
-
- INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign);
- VSETATTR (v, att_integer|att_readonly);
-
-#if defined (HISTORY)
- INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL);
- VSETATTR (v, att_integer);
-#endif
-
-#if defined (READLINE)
- INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks);
-#endif
-
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
- v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0);
-#endif /* PUSHD_AND_POPD && ARRAY_VARS */
-
-#if defined (ARRAY_VARS)
- v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign);
-
-# if defined (DEBUGGER)
- v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset);
- v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset);
-# endif /* DEBUGGER */
- v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset);
- v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset);
-
- v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree);
-# if defined (ALIAS)
- v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree);
-# endif
-#endif
-
- v = init_funcname_var ();
-}
-
-/* **************************************************************** */
-/* */
-/* Retrieving variables and values */
-/* */
-/* **************************************************************** */
-
-/* How to get a pointer to the shell variable or function named NAME.
- HASHED_VARS is a pointer to the hash table containing the list
- of interest (either variables or functions). */
-
-static SHELL_VAR *
-hash_lookup (name, hashed_vars)
- const char *name;
- HASH_TABLE *hashed_vars;
-{
- BUCKET_CONTENTS *bucket;
-
- bucket = hash_search (name, hashed_vars, 0);
- return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL);
-}
-
-SHELL_VAR *
-var_lookup (name, vcontext)
- const char *name;
- VAR_CONTEXT *vcontext;
-{
- VAR_CONTEXT *vc;
- SHELL_VAR *v;
-
- v = (SHELL_VAR *)NULL;
- for (vc = vcontext; vc; vc = vc->down)
- if (v = hash_lookup (name, vc->table))
- break;
-
- return v;
-}
-
-/* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero,
- then also search the temporarily built list of exported variables.
- The lookup order is:
- temporary_env
- shell_variables list
-*/
-
-SHELL_VAR *
-find_variable_internal (name, force_tempenv)
- const char *name;
- int force_tempenv;
-{
- SHELL_VAR *var;
- int search_tempenv;
- VAR_CONTEXT *vc;
-
- var = (SHELL_VAR *)NULL;
-
- /* If explicitly requested, first look in the temporary environment for
- the variable. This allows constructs such as "foo=x eval 'echo $foo'"
- to get the `exported' value of $foo. This happens if we are executing
- a function or builtin, or if we are looking up a variable in a
- "subshell environment". */
- search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment);
-
- if (search_tempenv && temporary_env)
- var = hash_lookup (name, temporary_env);
-
- vc = shell_variables;
-#if 0
-if (search_tempenv == 0 && /* (subshell_environment & SUBSHELL_COMSUB) && */
- expanding_redir &&
- (this_shell_builtin == eval_builtin || this_shell_builtin == command_builtin))
- {
- itrace("find_variable_internal: search_tempenv == 0: skipping VC_BLTNENV");
- while (vc && (vc->flags & VC_BLTNENV))
- vc = vc->down;
- if (vc == 0)
- vc = shell_variables;
- }
-#endif
-
- if (var == 0)
- var = var_lookup (name, vc);
-
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
-}
-
-/* Look up and resolve the chain of nameref variables starting at V all the
- way to NULL or non-nameref. */
-SHELL_VAR *
-find_variable_nameref (v)
- SHELL_VAR *v;
-{
- int level;
- char *newname;
-
- level = 0;
- while (v && nameref_p (v))
- {
- level++;
- if (level > NAMEREF_MAX)
- return ((SHELL_VAR *)0); /* error message here? */
- newname = nameref_cell (v);
- if (newname == 0 || *newname == '\0')
- return ((SHELL_VAR *)0);
- v = find_variable_internal (newname, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
- }
- return v;
-}
-
-/* Resolve the chain of nameref variables for NAME. XXX - could change later */
-SHELL_VAR *
-find_variable_last_nameref (name)
- const char *name;
-{
- SHELL_VAR *v, *nv;
- char *newname;
- int level;
-
- nv = v = find_variable_noref (name);
- level = 0;
- while (v && nameref_p (v))
- {
- level++;
- if (level > NAMEREF_MAX)
- return ((SHELL_VAR *)0); /* error message here? */
- newname = nameref_cell (v);
- if (newname == 0 || *newname == '\0')
- return ((SHELL_VAR *)0);
- nv = v;
- v = find_variable_internal (newname, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
- }
- return nv;
-}
-
-/* Resolve the chain of nameref variables for NAME. XXX - could change later */
-SHELL_VAR *
-find_global_variable_last_nameref (name)
- const char *name;
-{
- SHELL_VAR *v, *nv;
- char *newname;
- int level;
-
- nv = v = find_global_variable_noref (name);
- level = 0;
- while (v && nameref_p (v))
- {
- level++;
- if (level > NAMEREF_MAX)
- return ((SHELL_VAR *)0); /* error message here? */
- newname = nameref_cell (v);
- if (newname == 0 || *newname == '\0')
- return ((SHELL_VAR *)0);
- nv = v;
- v = find_global_variable_noref (newname);
- }
- return nv;
-}
-
-static SHELL_VAR *
-find_nameref_at_context (v, vc)
- SHELL_VAR *v;
- VAR_CONTEXT *vc;
-{
- SHELL_VAR *nv, *nv2;
- VAR_CONTEXT *nvc;
- char *newname;
- int level;
-
- nv = v;
- level = 1;
- while (nv && nameref_p (nv))
- {
- level++;
- if (level > NAMEREF_MAX)
- return ((SHELL_VAR *)NULL);
- newname = nameref_cell (nv);
- if (newname == 0 || *newname == '\0')
- return ((SHELL_VAR *)NULL);
- nv2 = hash_lookup (newname, vc->table);
- if (nv2 == 0)
- break;
- nv = nv2;
- }
- return nv;
-}
-
-/* Do nameref resolution from the VC, which is the local context for some
- function or builtin, `up' the chain to the global variables context. If
- NVCP is not NULL, return the variable context where we finally ended the
- nameref resolution (so the bind_variable_internal can use the correct
- variable context and hash table). */
-static SHELL_VAR *
-find_variable_nameref_context (v, vc, nvcp)
- SHELL_VAR *v;
- VAR_CONTEXT *vc;
- VAR_CONTEXT **nvcp;
-{
- SHELL_VAR *nv, *nv2;
- VAR_CONTEXT *nvc;
-
- /* Look starting at the current context all the way `up' */
- for (nv = v, nvc = vc; nvc; nvc = nvc->down)
- {
- nv2 = find_nameref_at_context (nv, nvc);
- if (nv2 == 0)
- continue;
- nv = nv2;
- if (*nvcp)
- *nvcp = nvc;
- }
- return (nameref_p (nv) ? (SHELL_VAR *)NULL : nv);
-}
-
-/* Do nameref resolution from the VC, which is the local context for some
- function or builtin, `up' the chain to the global variables context. If
- NVCP is not NULL, return the variable context where we finally ended the
- nameref resolution (so the bind_variable_internal can use the correct
- variable context and hash table). */
-static SHELL_VAR *
-find_variable_last_nameref_context (v, vc, nvcp)
- SHELL_VAR *v;
- VAR_CONTEXT *vc;
- VAR_CONTEXT **nvcp;
-{
- SHELL_VAR *nv, *nv2;
- VAR_CONTEXT *nvc;
-
- /* Look starting at the current context all the way `up' */
- for (nv = v, nvc = vc; nvc; nvc = nvc->down)
- {
- nv2 = find_nameref_at_context (nv, nvc);
- if (nv2 == 0)
- continue;
- nv = nv2;
- if (*nvcp)
- *nvcp = nvc;
- }
- return (nameref_p (nv) ? nv : (SHELL_VAR *)NULL);
-}
-
-/* Find a variable, forcing a search of the temporary environment first */
-SHELL_VAR *
-find_variable_tempenv (name)
- const char *name;
-{
- SHELL_VAR *var;
-
- var = find_variable_internal (name, 1);
- if (var && nameref_p (var))
- var = find_variable_nameref (var);
- return (var);
-}
-
-/* Find a variable, not forcing a search of the temporary environment first */
-SHELL_VAR *
-find_variable_notempenv (name)
- const char *name;
-{
- SHELL_VAR *var;
-
- var = find_variable_internal (name, 0);
- if (var && nameref_p (var))
- var = find_variable_nameref (var);
- return (var);
-}
-
-SHELL_VAR *
-find_global_variable (name)
- const char *name;
-{
- SHELL_VAR *var;
-
- var = var_lookup (name, global_variables);
- if (var && nameref_p (var))
- var = find_variable_nameref (var);
-
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
-}
-
-SHELL_VAR *
-find_global_variable_noref (name)
- const char *name;
-{
- SHELL_VAR *var;
-
- var = var_lookup (name, global_variables);
-
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
-}
-
-SHELL_VAR *
-find_shell_variable (name)
- const char *name;
-{
- SHELL_VAR *var;
-
- var = var_lookup (name, shell_variables);
- if (var && nameref_p (var))
- var = find_variable_nameref (var);
-
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
-}
-
-/* Look up the variable entry named NAME. Returns the entry or NULL. */
-SHELL_VAR *
-find_variable (name)
- const char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable_internal (name, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
- if (v && nameref_p (v))
- v = find_variable_nameref (v);
- return v;
-}
-
-SHELL_VAR *
-find_variable_noref (name)
- const char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable_internal (name, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
- return v;
-}
-
-/* Look up the function entry whose name matches STRING.
- Returns the entry or NULL. */
-SHELL_VAR *
-find_function (name)
- const char *name;
-{
- return (hash_lookup (name, shell_functions));
-}
-
-/* Find the function definition for the shell function named NAME. Returns
- the entry or NULL. */
-FUNCTION_DEF *
-find_function_def (name)
- const char *name;
-{
-#if defined (DEBUGGER)
- return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs));
-#else
- return ((FUNCTION_DEF *)0);
-#endif
-}
-
-/* Return the value of VAR. VAR is assumed to have been the result of a
- lookup without any subscript, if arrays are compiled into the shell. */
-char *
-get_variable_value (var)
- SHELL_VAR *var;
-{
- if (var == 0)
- return ((char *)NULL);
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- return (array_reference (array_cell (var), 0));
- else if (assoc_p (var))
- return (assoc_reference (assoc_cell (var), "0"));
-#endif
- else
- return (value_cell (var));
-}
-
-/* Return the string value of a variable. Return NULL if the variable
- doesn't exist. Don't cons a new string. This is a potential memory
- leak if the variable is found in the temporary environment. Since
- functions and variables have separate name spaces, returns NULL if
- var_name is a shell function only. */
-char *
-get_string_value (var_name)
- const char *var_name;
-{
- SHELL_VAR *var;
-
- var = find_variable (var_name);
- return ((var) ? get_variable_value (var) : (char *)NULL);
-}
-
-/* This is present for use by the tilde and readline libraries. */
-char *
-sh_get_env_value (v)
- const char *v;
-{
- return get_string_value (v);
-}
-
-/* **************************************************************** */
-/* */
-/* Creating and setting variables */
-/* */
-/* **************************************************************** */
-
-/* Set NAME to VALUE if NAME has no value. */
-SHELL_VAR *
-set_if_not (name, value)
- char *name, *value;
-{
- SHELL_VAR *v;
-
- if (shell_variables == 0)
- create_variable_tables ();
-
- v = find_variable (name);
- if (v == 0)
- v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0);
- return (v);
-}
-
-/* Create a local variable referenced by NAME. */
-SHELL_VAR *
-make_local_variable (name)
- const char *name;
-{
- SHELL_VAR *new_var, *old_var;
- VAR_CONTEXT *vc;
- int was_tmpvar;
- char *tmp_value;
-
- /* local foo; local foo; is a no-op. */
- old_var = find_variable (name);
- if (old_var && local_p (old_var) && old_var->context == variable_context)
- {
- VUNSETATTR (old_var, att_invisible);
- return (old_var);
- }
-
- was_tmpvar = old_var && tempvar_p (old_var);
- if (was_tmpvar)
- tmp_value = value_cell (old_var);
-
- for (vc = shell_variables; vc; vc = vc->down)
- if (vc_isfuncenv (vc) && vc->scope == variable_context)
- break;
-
- if (vc == 0)
- {
- internal_error (_("make_local_variable: no function context at current scope"));
- return ((SHELL_VAR *)NULL);
- }
- else if (vc->table == 0)
- vc->table = hash_create (TEMPENV_HASH_BUCKETS);
-
- /* Since this is called only from the local/declare/typeset code, we can
- call builtin_error here without worry (of course, it will also work
- for anything that sets this_command_name). Variables with the `noassign'
- attribute may not be made local. The test against old_var's context
- level is to disallow local copies of readonly global variables (since I
- believe that this could be a security hole). Readonly copies of calling
- function local variables are OK. */
- if (old_var && (noassign_p (old_var) ||
- (readonly_p (old_var) && old_var->context == 0)))
- {
- if (readonly_p (old_var))
- sh_readonly (name);
-#if 0
- /* Let noassign variables through with a warning */
- else if (noassign_p (old_var))
- builtin_warning (_("%s: local variable shadows special variable"), name);
- if (readonly_p (old_var))
-#endif
- return ((SHELL_VAR *)NULL);
- }
-
- if (old_var == 0)
- new_var = make_new_variable (name, vc->table);
- else
- {
- new_var = make_new_variable (name, vc->table);
-
- /* If we found this variable in one of the temporary environments,
- inherit its value. Watch to see if this causes problems with
- things like `x=4 local x'. */
- /* XXX - we should only do this if the variable is not an array. */
- if (was_tmpvar)
- var_setvalue (new_var, savestring (tmp_value));
-
- new_var->attributes = exported_p (old_var) ? att_exported : 0;
- }
-
- vc->flags |= VC_HASLOCAL;
-
- new_var->context = variable_context;
- VSETATTR (new_var, att_local);
-
- if (ifsname (name))
- setifs (new_var);
-
- return (new_var);
-}
-
-/* Create a new shell variable with name NAME. */
-static SHELL_VAR *
-new_shell_variable (name)
- const char *name;
-{
- SHELL_VAR *entry;
-
- entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- entry->name = savestring (name);
- var_setvalue (entry, (char *)NULL);
- CLEAR_EXPORTSTR (entry);
-
- entry->dynamic_value = (sh_var_value_func_t *)NULL;
- entry->assign_func = (sh_var_assign_func_t *)NULL;
-
- entry->attributes = 0;
-
- /* Always assume variables are to be made at toplevel!
- make_local_variable has the responsibilty of changing the
- variable context. */
- entry->context = 0;
-
- return (entry);
-}
-
-/* Create a new shell variable with name NAME and add it to the hash table
- TABLE. */
-static SHELL_VAR *
-make_new_variable (name, table)
- const char *name;
- HASH_TABLE *table;
-{
- SHELL_VAR *entry;
- BUCKET_CONTENTS *elt;
-
- entry = new_shell_variable (name);
-
- /* Make sure we have a shell_variables hash table to add to. */
- if (shell_variables == 0)
- create_variable_tables ();
-
- elt = hash_insert (savestring (name), table, HASH_NOSRCH);
- elt->data = (PTR_T)entry;
-
- return entry;
-}
-
-#if defined (ARRAY_VARS)
-SHELL_VAR *
-make_new_array_variable (name)
- char *name;
-{
- SHELL_VAR *entry;
- ARRAY *array;
-
- entry = make_new_variable (name, global_variables->table);
- array = array_create ();
-
- var_setarray (entry, array);
- VSETATTR (entry, att_array);
- return entry;
-}
-
-SHELL_VAR *
-make_local_array_variable (name, assoc_ok)
- char *name;
- int assoc_ok;
-{
- SHELL_VAR *var;
- ARRAY *array;
-
- var = make_local_variable (name);
- if (var == 0 || array_p (var) || (assoc_ok && assoc_p (var)))
- return var;
-
- array = array_create ();
-
- dispose_variable_value (var);
- var_setarray (var, array);
- VSETATTR (var, att_array);
- return var;
-}
-
-SHELL_VAR *
-make_new_assoc_variable (name)
- char *name;
-{
- SHELL_VAR *entry;
- HASH_TABLE *hash;
-
- entry = make_new_variable (name, global_variables->table);
- hash = assoc_create (0);
-
- var_setassoc (entry, hash);
- VSETATTR (entry, att_assoc);
- return entry;
-}
-
-SHELL_VAR *
-make_local_assoc_variable (name)
- char *name;
-{
- SHELL_VAR *var;
- HASH_TABLE *hash;
-
- var = make_local_variable (name);
- if (var == 0 || assoc_p (var))
- return var;
-
- dispose_variable_value (var);
- hash = assoc_create (0);
-
- var_setassoc (var, hash);
- VSETATTR (var, att_assoc);
- return var;
-}
-#endif
-
-char *
-make_variable_value (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- char *retval, *oval;
- intmax_t lval, rval;
- int expok, olen, op;
-
- /* If this variable has had its type set to integer (via `declare -i'),
- then do expression evaluation on it and store the result. The
- functions in expr.c (evalexp()) and bind_int_variable() are responsible
- for turning off the integer flag if they don't want further
- evaluation done. */
- if (integer_p (var))
- {
- if (flags & ASS_APPEND)
- {
- oval = value_cell (var);
- lval = evalexp (oval, &expok); /* ksh93 seems to do this */
- if (expok == 0)
- {
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- }
- rval = evalexp (value, &expok);
- if (expok == 0)
- {
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- if (flags & ASS_APPEND)
- rval += lval;
- retval = itos (rval);
- }
-#if defined (CASEMOD_ATTRS)
- else if (capcase_p (var) || uppercase_p (var) || lowercase_p (var))
- {
- if (flags & ASS_APPEND)
- {
- oval = get_variable_value (var);
- if (oval == 0) /* paranoia */
- oval = "";
- olen = STRLEN (oval);
- retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
- strcpy (retval, oval);
- if (value)
- strcpy (retval+olen, value);
- }
- else if (*value)
- retval = savestring (value);
- else
- {
- retval = (char *)xmalloc (1);
- retval[0] = '\0';
- }
- op = capcase_p (var) ? CASE_CAPITALIZE
- : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER);
- oval = sh_modcase (retval, (char *)0, op);
- free (retval);
- retval = oval;
- }
-#endif /* CASEMOD_ATTRS */
- else if (value)
- {
- if (flags & ASS_APPEND)
- {
- oval = get_variable_value (var);
- if (oval == 0) /* paranoia */
- oval = "";
- olen = STRLEN (oval);
- retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
- strcpy (retval, oval);
- if (value)
- strcpy (retval+olen, value);
- }
- else if (*value)
- retval = savestring (value);
- else
- {
- retval = (char *)xmalloc (1);
- retval[0] = '\0';
- }
- }
- else
- retval = (char *)NULL;
-
- return retval;
-}
-
-/* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the
- temporary environment (but usually is not). */
-static SHELL_VAR *
-bind_variable_internal (name, value, table, hflags, aflags)
- const char *name;
- char *value;
- HASH_TABLE *table;
- int hflags, aflags;
-{
- char *newval;
- SHELL_VAR *entry;
-
- entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table);
- /* Follow the nameref chain here if this is the global variables table */
- if (entry && nameref_p (entry) && (invisible_p (entry) == 0) && table == global_variables->table)
- {
- entry = find_global_variable (entry->name);
- /* Let's see if we have a nameref referencing a variable that hasn't yet
- been created. */
- if (entry == 0)
- entry = find_variable_last_nameref (name); /* XXX */
- if (entry == 0) /* just in case */
- return (entry);
- }
-
- /* The first clause handles `declare -n ref; ref=x;' */
- if (entry && invisible_p (entry) && nameref_p (entry))
- goto assign_value;
- else if (entry && nameref_p (entry))
- {
- newval = nameref_cell (entry);
-#if defined (ARRAY_VARS)
- /* declare -n foo=x[2] */
- if (valid_array_reference (newval))
- /* XXX - should it be aflags? */
- entry = assign_array_element (newval, make_variable_value (entry, value, 0), aflags);
- else
-#endif
- {
- entry = make_new_variable (newval, table);
- var_setvalue (entry, make_variable_value (entry, value, 0));
- }
- }
- else if (entry == 0)
- {
- entry = make_new_variable (name, table);
- var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */
- }
- else if (entry->assign_func) /* array vars have assign functions now */
- {
- INVALIDATE_EXPORTSTR (entry);
- newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value;
- if (assoc_p (entry))
- entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0"));
- else if (array_p (entry))
- entry = (*(entry->assign_func)) (entry, newval, 0, 0);
- else
- entry = (*(entry->assign_func)) (entry, newval, -1, 0);
- if (newval != value)
- free (newval);
- return (entry);
- }
- else
- {
-assign_value:
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- /* Variables which are bound are visible. */
- VUNSETATTR (entry, att_invisible);
-
-#if defined (ARRAY_VARS)
- if (assoc_p (entry) || array_p (entry))
- newval = make_array_variable_value (entry, 0, "0", value, aflags);
- else
-#endif
-
- newval = make_variable_value (entry, value, aflags); /* XXX */
-
- /* Invalidate any cached export string */
- INVALIDATE_EXPORTSTR (entry);
-
-#if defined (ARRAY_VARS)
- /* XXX -- this bears looking at again -- XXX */
- /* If an existing array variable x is being assigned to with x=b or
- `read x' or something of that nature, silently convert it to
- x[0]=b or `read x[0]'. */
- if (assoc_p (entry))
- {
- assoc_insert (assoc_cell (entry), savestring ("0"), newval);
- free (newval);
- }
- else if (array_p (entry))
- {
- array_insert (array_cell (entry), 0, newval);
- free (newval);
- }
- else
-#endif
- {
- FREE (value_cell (entry));
- var_setvalue (entry, newval);
- }
- }
-
- if (mark_modified_vars)
- VSETATTR (entry, att_exported);
-
- if (exported_p (entry))
- array_needs_making = 1;
-
- return (entry);
-}
-
-/* Bind a variable NAME to VALUE. This conses up the name
- and value strings. If we have a temporary environment, we bind there
- first, then we bind into shell_variables. */
-
-SHELL_VAR *
-bind_variable (name, value, flags)
- const char *name;
- char *value;
- int flags;
-{
- SHELL_VAR *v, *nv;
- VAR_CONTEXT *vc, *nvc;
- int level;
-
- if (shell_variables == 0)
- create_variable_tables ();
-
- /* If we have a temporary environment, look there first for the variable,
- and, if found, modify the value there before modifying it in the
- shell_variables table. This allows sourced scripts to modify values
- given to them in a temporary environment while modifying the variable
- value that the caller sees. */
- if (temporary_env)
- bind_tempenv_variable (name, value);
-
- /* XXX -- handle local variables here. */
- for (vc = shell_variables; vc; vc = vc->down)
- {
- if (vc_isfuncenv (vc) || vc_isbltnenv (vc))
- {
- v = hash_lookup (name, vc->table);
- nvc = vc;
- if (v && nameref_p (v))
- {
- nv = find_variable_nameref_context (v, vc, &nvc);
- if (nv == 0)
- {
- nv = find_variable_last_nameref_context (v, vc, &nvc);
- if (nv && nameref_p (nv))
- return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags));
- else
- v = nv;
- }
- else
- v = nv;
- }
- if (v)
- return (bind_variable_internal (v->name, value, nvc->table, 0, flags));
- }
- }
- /* bind_variable_internal will handle nameref resolution in this case */
- return (bind_variable_internal (name, value, global_variables->table, 0, flags));
-}
-
-SHELL_VAR *
-bind_global_variable (name, value, flags)
- const char *name;
- char *value;
- int flags;
-{
- SHELL_VAR *v, *nv;
- VAR_CONTEXT *vc, *nvc;
- int level;
-
- if (shell_variables == 0)
- create_variable_tables ();
-
- /* bind_variable_internal will handle nameref resolution in this case */
- return (bind_variable_internal (name, value, global_variables->table, 0, flags));
-}
-
-/* Make VAR, a simple shell variable, have value VALUE. Once assigned a
- value, variables are no longer invisible. This is a duplicate of part
- of the internals of bind_variable. If the variable is exported, or
- all modified variables should be exported, mark the variable for export
- and note that the export environment needs to be recreated. */
-SHELL_VAR *
-bind_variable_value (var, value, aflags)
- SHELL_VAR *var;
- char *value;
- int aflags;
-{
- char *t;
-
- VUNSETATTR (var, att_invisible);
-
- if (var->assign_func)
- {
- /* If we're appending, we need the old value, so use
- make_variable_value */
- t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value;
- (*(var->assign_func)) (var, t, -1, 0);
- if (t != value && t)
- free (t);
- }
- else
- {
- t = make_variable_value (var, value, aflags);
- FREE (value_cell (var));
- var_setvalue (var, t);
- }
-
- INVALIDATE_EXPORTSTR (var);
-
- if (mark_modified_vars)
- VSETATTR (var, att_exported);
-
- if (exported_p (var))
- array_needs_making = 1;
-
- return (var);
-}
-
-/* Bind/create a shell variable with the name LHS to the RHS.
- This creates or modifies a variable such that it is an integer.
-
- This used to be in expr.c, but it is here so that all of the
- variable binding stuff is localized. Since we don't want any
- recursive evaluation from bind_variable() (possible without this code,
- since bind_variable() calls the evaluator for variables with the integer
- attribute set), we temporarily turn off the integer attribute for each
- variable we set here, then turn it back on after binding as necessary. */
-
-SHELL_VAR *
-bind_int_variable (lhs, rhs)
- char *lhs, *rhs;
-{
- register SHELL_VAR *v;
- int isint, isarr, implicitarray;
-
- isint = isarr = implicitarray = 0;
-#if defined (ARRAY_VARS)
- if (valid_array_reference (lhs))
- {
- isarr = 1;
- v = array_variable_part (lhs, (char **)0, (int *)0);
- }
- else
-#endif
- v = find_variable (lhs);
-
- if (v)
- {
- isint = integer_p (v);
- VUNSETATTR (v, att_integer);
-#if defined (ARRAY_VARS)
- if (array_p (v) && isarr == 0)
- implicitarray = 1;
-#endif
- }
-
-#if defined (ARRAY_VARS)
- if (isarr)
- v = assign_array_element (lhs, rhs, 0);
- else if (implicitarray)
- v = bind_array_variable (lhs, 0, rhs, 0);
- else
-#endif
- v = bind_variable (lhs, rhs, 0);
-
- if (v && isint)
- VSETATTR (v, att_integer);
-
- return (v);
-}
-
-SHELL_VAR *
-bind_var_to_int (var, val)
- char *var;
- intmax_t val;
-{
- char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p;
-
- p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0);
- return (bind_int_variable (var, p));
-}
-
-/* Do a function binding to a variable. You pass the name and
- the command to bind to. This conses the name and command. */
-SHELL_VAR *
-bind_function (name, value)
- const char *name;
- COMMAND *value;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (entry == 0)
- {
- BUCKET_CONTENTS *elt;
-
- elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH);
- entry = new_shell_variable (name);
- elt->data = (PTR_T)entry;
- }
- else
- INVALIDATE_EXPORTSTR (entry);
-
- if (var_isset (entry))
- dispose_command (function_cell (entry));
-
- if (value)
- var_setfunc (entry, copy_command (value));
- else
- var_setfunc (entry, 0);
-
- VSETATTR (entry, att_function);
-
- if (mark_modified_vars)
- VSETATTR (entry, att_exported);
-
- VUNSETATTR (entry, att_invisible); /* Just to be sure */
-
- if (exported_p (entry))
- array_needs_making = 1;
-
-#if defined (PROGRAMMABLE_COMPLETION)
- set_itemlist_dirty (&it_functions);
-#endif
-
- return (entry);
-}
-
-#if defined (DEBUGGER)
-/* Bind a function definition, which includes source file and line number
- information in addition to the command, into the FUNCTION_DEF hash table.*/
-void
-bind_function_def (name, value)
- const char *name;
- FUNCTION_DEF *value;
-{
- FUNCTION_DEF *entry;
- BUCKET_CONTENTS *elt;
- COMMAND *cmd;
-
- entry = find_function_def (name);
- if (entry)
- {
- dispose_function_def_contents (entry);
- entry = copy_function_def_contents (value, entry);
- }
- else
- {
- cmd = value->command;
- value->command = 0;
- entry = copy_function_def (value);
- value->command = cmd;
-
- elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH);
- elt->data = (PTR_T *)entry;
- }
-}
-#endif /* DEBUGGER */
-
-/* Add STRING, which is of the form foo=bar, to the temporary environment
- HASH_TABLE (temporary_env). The functions in execute_cmd.c are
- responsible for moving the main temporary env to one of the other
- temporary environments. The expansion code in subst.c calls this. */
-int
-assign_in_env (word, flags)
- WORD_DESC *word;
- int flags;
-{
- int offset;
- char *name, *temp, *value;
- SHELL_VAR *var;
- const char *string;
-
- string = word->word;
-
- offset = assignment (string, 0);
- name = savestring (string);
- value = (char *)NULL;
-
- if (name[offset] == '=')
- {
- name[offset] = 0;
-
- /* ignore the `+' when assigning temporary environment */
- if (name[offset - 1] == '+')
- name[offset - 1] = '\0';
-
- var = find_variable (name);
- if (var && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- free (name);
- return (0);
- }
-
- temp = name + offset + 1;
- value = expand_assignment_string_to_string (temp, 0);
- }
-
- if (temporary_env == 0)
- temporary_env = hash_create (TEMPENV_HASH_BUCKETS);
-
- var = hash_lookup (name, temporary_env);
- if (var == 0)
- var = make_new_variable (name, temporary_env);
- else
- FREE (value_cell (var));
-
- if (value == 0)
- {
- value = (char *)xmalloc (1); /* like do_assignment_internal */
- value[0] = '\0';
- }
-
- var_setvalue (var, value);
- var->attributes |= (att_exported|att_tempvar);
- var->context = variable_context; /* XXX */
-
- INVALIDATE_EXPORTSTR (var);
- var->exportstr = mk_env_string (name, value);
-
- array_needs_making = 1;
-
- if (flags)
- stupidly_hack_special_variables (name);
-
- if (echo_command_at_execute)
- /* The Korn shell prints the `+ ' in front of assignment statements,
- so we do too. */
- xtrace_print_assignment (name, value, 0, 1);
-
- free (name);
- return 1;
-}
-
-/* **************************************************************** */
-/* */
-/* Copying variables */
-/* */
-/* **************************************************************** */
-
-#ifdef INCLUDE_UNUSED
-/* Copy VAR to a new data structure and return that structure. */
-SHELL_VAR *
-copy_variable (var)
- SHELL_VAR *var;
-{
- SHELL_VAR *copy = (SHELL_VAR *)NULL;
-
- if (var)
- {
- copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- copy->attributes = var->attributes;
- copy->name = savestring (var->name);
-
- if (function_p (var))
- var_setfunc (copy, copy_command (function_cell (var)));
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- var_setarray (copy, array_copy (array_cell (var)));
- else if (assoc_p (var))
- var_setassoc (copy, assoc_copy (assoc_cell (var)));
-#endif
- else if (nameref_cell (var)) /* XXX - nameref */
- var_setref (copy, savestring (nameref_cell (var)));
- else if (value_cell (var)) /* XXX - nameref */
- var_setvalue (copy, savestring (value_cell (var)));
- else
- var_setvalue (copy, (char *)NULL);
-
- copy->dynamic_value = var->dynamic_value;
- copy->assign_func = var->assign_func;
-
- copy->exportstr = COPY_EXPORTSTR (var);
-
- copy->context = var->context;
- }
- return (copy);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Deleting and unsetting variables */
-/* */
-/* **************************************************************** */
-
-/* Dispose of the information attached to VAR. */
-static void
-dispose_variable_value (var)
- SHELL_VAR *var;
-{
- if (function_p (var))
- dispose_command (function_cell (var));
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- array_dispose (array_cell (var));
- else if (assoc_p (var))
- assoc_dispose (assoc_cell (var));
-#endif
- else if (nameref_p (var))
- FREE (nameref_cell (var));
- else
- FREE (value_cell (var));
-}
-
-void
-dispose_variable (var)
- SHELL_VAR *var;
-{
- if (var == 0)
- return;
-
- if (nofree_p (var) == 0)
- dispose_variable_value (var);
-
- FREE_EXPORTSTR (var);
-
- free (var->name);
-
- if (exported_p (var))
- array_needs_making = 1;
-
- free (var);
-}
-
-/* Unset the shell variable referenced by NAME. Unsetting a nameref variable
- unsets the variable it resolves to but leaves the nameref alone. */
-int
-unbind_variable (name)
- const char *name;
-{
- SHELL_VAR *v, *nv;
- int r;
-
- v = var_lookup (name, shell_variables);
- nv = (v && nameref_p (v)) ? find_variable_nameref (v) : (SHELL_VAR *)NULL;
-
- r = nv ? makunbound (nv->name, shell_variables) : makunbound (name, shell_variables);
- return r;
-}
-
-/* Unbind NAME, where NAME is assumed to be a nameref variable */
-int
-unbind_nameref (name)
- const char *name;
-{
- SHELL_VAR *v;
-
- v = var_lookup (name, shell_variables);
- if (v && nameref_p (v))
- return makunbound (name, shell_variables);
- return 0;
-}
-
-/* Unset the shell function named NAME. */
-int
-unbind_func (name)
- const char *name;
-{
- BUCKET_CONTENTS *elt;
- SHELL_VAR *func;
-
- elt = hash_remove (name, shell_functions, 0);
-
- if (elt == 0)
- return -1;
-
-#if defined (PROGRAMMABLE_COMPLETION)
- set_itemlist_dirty (&it_functions);
-#endif
-
- func = (SHELL_VAR *)elt->data;
- if (func)
- {
- if (exported_p (func))
- array_needs_making++;
- dispose_variable (func);
- }
-
- free (elt->key);
- free (elt);
-
- return 0;
-}
-
-#if defined (DEBUGGER)
-int
-unbind_function_def (name)
- const char *name;
-{
- BUCKET_CONTENTS *elt;
- FUNCTION_DEF *funcdef;
-
- elt = hash_remove (name, shell_function_defs, 0);
-
- if (elt == 0)
- return -1;
-
- funcdef = (FUNCTION_DEF *)elt->data;
- if (funcdef)
- dispose_function_def (funcdef);
-
- free (elt->key);
- free (elt);
-
- return 0;
-}
-#endif /* DEBUGGER */
-
-/* Make the variable associated with NAME go away. HASH_LIST is the
- hash table from which this variable should be deleted (either
- shell_variables or shell_functions).
- Returns non-zero if the variable couldn't be found. */
-int
-makunbound (name, vc)
- const char *name;
- VAR_CONTEXT *vc;
-{
- BUCKET_CONTENTS *elt, *new_elt;
- SHELL_VAR *old_var;
- VAR_CONTEXT *v;
- char *t;
-
- for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down)
- if (elt = hash_remove (name, v->table, 0))
- break;
-
- if (elt == 0)
- return (-1);
-
- old_var = (SHELL_VAR *)elt->data;
-
- if (old_var && exported_p (old_var))
- array_needs_making++;
-
- /* If we're unsetting a local variable and we're still executing inside
- the function, just mark the variable as invisible. The function
- eventually called by pop_var_context() will clean it up later. This
- must be done so that if the variable is subsequently assigned a new
- value inside the function, the `local' attribute is still present.
- We also need to add it back into the correct hash table. */
- if (old_var && local_p (old_var) && variable_context == old_var->context)
- {
- if (nofree_p (old_var))
- var_setvalue (old_var, (char *)NULL);
-#if defined (ARRAY_VARS)
- else if (array_p (old_var))
- array_dispose (array_cell (old_var));
- else if (assoc_p (old_var))
- assoc_dispose (assoc_cell (old_var));
-#endif
- else if (nameref_p (old_var))
- FREE (nameref_cell (old_var));
- else
- FREE (value_cell (old_var));
- /* Reset the attributes. Preserve the export attribute if the variable
- came from a temporary environment. Make sure it stays local, and
- make it invisible. */
- old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0;
- VSETATTR (old_var, att_local);
- VSETATTR (old_var, att_invisible);
- var_setvalue (old_var, (char *)NULL);
- INVALIDATE_EXPORTSTR (old_var);
-
- new_elt = hash_insert (savestring (old_var->name), v->table, 0);
- new_elt->data = (PTR_T)old_var;
- stupidly_hack_special_variables (old_var->name);
-
- free (elt->key);
- free (elt);
- return (0);
- }
-
- /* Have to save a copy of name here, because it might refer to
- old_var->name. If so, stupidly_hack_special_variables will
- reference freed memory. */
- t = savestring (name);
-
- free (elt->key);
- free (elt);
-
- dispose_variable (old_var);
- stupidly_hack_special_variables (t);
- free (t);
-
- return (0);
-}
-
-/* Get rid of all of the variables in the current context. */
-void
-kill_all_local_variables ()
-{
- VAR_CONTEXT *vc;
-
- for (vc = shell_variables; vc; vc = vc->down)
- if (vc_isfuncenv (vc) && vc->scope == variable_context)
- break;
- if (vc == 0)
- return; /* XXX */
-
- if (vc->table && vc_haslocals (vc))
- {
- delete_all_variables (vc->table);
- hash_dispose (vc->table);
- }
- vc->table = (HASH_TABLE *)NULL;
-}
-
-static void
-free_variable_hash_data (data)
- PTR_T data;
-{
- SHELL_VAR *var;
-
- var = (SHELL_VAR *)data;
- dispose_variable (var);
-}
-
-/* Delete the entire contents of the hash table. */
-void
-delete_all_variables (hashed_vars)
- HASH_TABLE *hashed_vars;
-{
- hash_flush (hashed_vars, free_variable_hash_data);
-}
-
-/* **************************************************************** */
-/* */
-/* Setting variable attributes */
-/* */
-/* **************************************************************** */
-
-#define FIND_OR_MAKE_VARIABLE(name, entry) \
- do \
- { \
- entry = find_variable (name); \
- if (!entry) \
- { \
- entry = bind_variable (name, "", 0); \
- if (!no_invisible_vars && entry) entry->attributes |= att_invisible; \
- } \
- } \
- while (0)
-
-/* Make the variable associated with NAME be readonly.
- If NAME does not exist yet, create it. */
-void
-set_var_read_only (name)
- char *name;
-{
- SHELL_VAR *entry;
-
- FIND_OR_MAKE_VARIABLE (name, entry);
- VSETATTR (entry, att_readonly);
-}
-
-#ifdef INCLUDE_UNUSED
-/* Make the function associated with NAME be readonly.
- If NAME does not exist, we just punt, like auto_export code below. */
-void
-set_func_read_only (name)
- const char *name;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (entry)
- VSETATTR (entry, att_readonly);
-}
-
-/* Make the variable associated with NAME be auto-exported.
- If NAME does not exist yet, create it. */
-void
-set_var_auto_export (name)
- char *name;
-{
- SHELL_VAR *entry;
-
- FIND_OR_MAKE_VARIABLE (name, entry);
- set_auto_export (entry);
-}
-
-/* Make the function associated with NAME be auto-exported. */
-void
-set_func_auto_export (name)
- const char *name;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (entry)
- set_auto_export (entry);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Creating lists of variables */
-/* */
-/* **************************************************************** */
-
-static VARLIST *
-vlist_alloc (nentries)
- int nentries;
-{
- VARLIST *vlist;
-
- vlist = (VARLIST *)xmalloc (sizeof (VARLIST));
- vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *));
- vlist->list_size = nentries;
- vlist->list_len = 0;
- vlist->list[0] = (SHELL_VAR *)NULL;
-
- return vlist;
-}
-
-static VARLIST *
-vlist_realloc (vlist, n)
- VARLIST *vlist;
- int n;
-{
- if (vlist == 0)
- return (vlist = vlist_alloc (n));
- if (n > vlist->list_size)
- {
- vlist->list_size = n;
- vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *));
- }
- return vlist;
-}
-
-static void
-vlist_add (vlist, var, flags)
- VARLIST *vlist;
- SHELL_VAR *var;
- int flags;
-{
- register int i;
-
- for (i = 0; i < vlist->list_len; i++)
- if (STREQ (var->name, vlist->list[i]->name))
- break;
- if (i < vlist->list_len)
- return;
-
- if (i >= vlist->list_size)
- vlist = vlist_realloc (vlist, vlist->list_size + 16);
-
- vlist->list[vlist->list_len++] = var;
- vlist->list[vlist->list_len] = (SHELL_VAR *)NULL;
-}
-
-/* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the
- variables for which FUNCTION returns a non-zero value. A NULL value
- for FUNCTION means to use all variables. */
-SHELL_VAR **
-map_over (function, vc)
- sh_var_map_func_t *function;
- VAR_CONTEXT *vc;
-{
- VAR_CONTEXT *v;
- VARLIST *vlist;
- SHELL_VAR **ret;
- int nentries;
-
- for (nentries = 0, v = vc; v; v = v->down)
- nentries += HASH_ENTRIES (v->table);
-
- if (nentries == 0)
- return (SHELL_VAR **)NULL;
-
- vlist = vlist_alloc (nentries);
-
- for (v = vc; v; v = v->down)
- flatten (v->table, function, vlist, 0);
-
- ret = vlist->list;
- free (vlist);
- return ret;
-}
-
-SHELL_VAR **
-map_over_funcs (function)
- sh_var_map_func_t *function;
-{
- VARLIST *vlist;
- SHELL_VAR **ret;
-
- if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0)
- return ((SHELL_VAR **)NULL);
-
- vlist = vlist_alloc (HASH_ENTRIES (shell_functions));
-
- flatten (shell_functions, function, vlist, 0);
-
- ret = vlist->list;
- free (vlist);
- return ret;
-}
-
-/* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those
- elements for which FUNC succeeds to VLIST->list. FLAGS is reserved
- for future use. Only unique names are added to VLIST. If FUNC is
- NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is
- NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST
- and FUNC are both NULL, nothing happens. */
-static void
-flatten (var_hash_table, func, vlist, flags)
- HASH_TABLE *var_hash_table;
- sh_var_map_func_t *func;
- VARLIST *vlist;
- int flags;
-{
- register int i;
- register BUCKET_CONTENTS *tlist;
- int r;
- SHELL_VAR *var;
-
- if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0))
- return;
-
- for (i = 0; i < var_hash_table->nbuckets; i++)
- {
- for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next)
- {
- var = (SHELL_VAR *)tlist->data;
-
- r = func ? (*func) (var) : 1;
- if (r && vlist)
- vlist_add (vlist, var, flags);
- }
- }
-}
-
-void
-sort_variables (array)
- SHELL_VAR **array;
-{
- qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp);
-}
-
-static int
-qsort_var_comp (var1, var2)
- SHELL_VAR **var1, **var2;
-{
- int result;
-
- if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0)
- result = strcmp ((*var1)->name, (*var2)->name);
-
- return (result);
-}
-
-/* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for
- which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
-static SHELL_VAR **
-vapply (func)
- sh_var_map_func_t *func;
-{
- SHELL_VAR **list;
-
- list = map_over (func, shell_variables);
- if (list /* && posixly_correct */)
- sort_variables (list);
- return (list);
-}
-
-/* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for
- which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
-static SHELL_VAR **
-fapply (func)
- sh_var_map_func_t *func;
-{
- SHELL_VAR **list;
-
- list = map_over_funcs (func);
- if (list /* && posixly_correct */)
- sort_variables (list);
- return (list);
-}
-
-/* Create a NULL terminated array of all the shell variables. */
-SHELL_VAR **
-all_shell_variables ()
-{
- return (vapply ((sh_var_map_func_t *)NULL));
-}
-
-/* Create a NULL terminated array of all the shell functions. */
-SHELL_VAR **
-all_shell_functions ()
-{
- return (fapply ((sh_var_map_func_t *)NULL));
-}
-
-static int
-visible_var (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0);
-}
-
-SHELL_VAR **
-all_visible_functions ()
-{
- return (fapply (visible_var));
-}
-
-SHELL_VAR **
-all_visible_variables ()
-{
- return (vapply (visible_var));
-}
-
-/* Return non-zero if the variable VAR is visible and exported. Array
- variables cannot be exported. */
-static int
-visible_and_exported (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && exported_p (var));
-}
-
-/* Candidate variables for the export environment are either valid variables
- with the export attribute or invalid variables inherited from the initial
- environment and simply passed through. */
-static int
-export_environment_candidate (var)
- SHELL_VAR *var;
-{
- return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var)));
-}
-
-/* Return non-zero if VAR is a local variable in the current context and
- is exported. */
-static int
-local_and_exported (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var));
-}
-
-SHELL_VAR **
-all_exported_variables ()
-{
- return (vapply (visible_and_exported));
-}
-
-SHELL_VAR **
-local_exported_variables ()
-{
- return (vapply (local_and_exported));
-}
-
-static int
-variable_in_context (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context);
-}
-
-SHELL_VAR **
-all_local_variables ()
-{
- VARLIST *vlist;
- SHELL_VAR **ret;
- VAR_CONTEXT *vc;
-
- vc = shell_variables;
- for (vc = shell_variables; vc; vc = vc->down)
- if (vc_isfuncenv (vc) && vc->scope == variable_context)
- break;
-
- if (vc == 0)
- {
- internal_error (_("all_local_variables: no function context at current scope"));
- return (SHELL_VAR **)NULL;
- }
- if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0)
- return (SHELL_VAR **)NULL;
-
- vlist = vlist_alloc (HASH_ENTRIES (vc->table));
-
- flatten (vc->table, variable_in_context, vlist, 0);
-
- ret = vlist->list;
- free (vlist);
- if (ret)
- sort_variables (ret);
- return ret;
-}
-
-#if defined (ARRAY_VARS)
-/* Return non-zero if the variable VAR is visible and an array. */
-static int
-visible_array_vars (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && array_p (var));
-}
-
-SHELL_VAR **
-all_array_variables ()
-{
- return (vapply (visible_array_vars));
-}
-#endif /* ARRAY_VARS */
-
-char **
-all_variables_matching_prefix (prefix)
- const char *prefix;
-{
- SHELL_VAR **varlist;
- char **rlist;
- int vind, rind, plen;
-
- plen = STRLEN (prefix);
- varlist = all_visible_variables ();
- for (vind = 0; varlist && varlist[vind]; vind++)
- ;
- if (varlist == 0 || vind == 0)
- return ((char **)NULL);
- rlist = strvec_create (vind + 1);
- for (vind = rind = 0; varlist[vind]; vind++)
- {
- if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen))
- rlist[rind++] = savestring (varlist[vind]->name);
- }
- rlist[rind] = (char *)0;
- free (varlist);
-
- return rlist;
-}
-
-/* **************************************************************** */
-/* */
-/* Managing temporary variable scopes */
-/* */
-/* **************************************************************** */
-
-/* Make variable NAME have VALUE in the temporary environment. */
-static SHELL_VAR *
-bind_tempenv_variable (name, value)
- const char *name;
- char *value;
-{
- SHELL_VAR *var;
-
- var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL;
-
- if (var)
- {
- FREE (value_cell (var));
- var_setvalue (var, savestring (value));
- INVALIDATE_EXPORTSTR (var);
- }
-
- return (var);
-}
-
-/* Find a variable in the temporary environment that is named NAME.
- Return the SHELL_VAR *, or NULL if not found. */
-SHELL_VAR *
-find_tempenv_variable (name)
- const char *name;
-{
- return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL);
-}
-
-char **tempvar_list;
-int tvlist_ind;
-
-/* Push the variable described by (SHELL_VAR *)DATA down to the next
- variable context from the temporary environment. */
-static void
-push_temp_var (data)
- PTR_T data;
-{
- SHELL_VAR *var, *v;
- HASH_TABLE *binding_table;
-
- var = (SHELL_VAR *)data;
-
- binding_table = shell_variables->table;
- if (binding_table == 0)
- {
- if (shell_variables == global_variables)
- /* shouldn't happen */
- binding_table = shell_variables->table = global_variables->table = hash_create (0);
- else
- binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS);
- }
-
- v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, 0);
-
- /* XXX - should we set the context here? It shouldn't matter because of how
- assign_in_env works, but might want to check. */
- if (binding_table == global_variables->table) /* XXX */
- var->attributes &= ~(att_tempvar|att_propagate);
- else
- {
- var->attributes |= att_propagate;
- if (binding_table == shell_variables->table)
- shell_variables->flags |= VC_HASTMPVAR;
- }
- v->attributes |= var->attributes;
-
- if (find_special_var (var->name) >= 0)
- tempvar_list[tvlist_ind++] = savestring (var->name);
-
- dispose_variable (var);
-}
-
-static void
-propagate_temp_var (data)
- PTR_T data;
-{
- SHELL_VAR *var;
-
- var = (SHELL_VAR *)data;
- if (tempvar_p (var) && (var->attributes & att_propagate))
- push_temp_var (data);
- else
- {
- if (find_special_var (var->name) >= 0)
- tempvar_list[tvlist_ind++] = savestring (var->name);
- dispose_variable (var);
- }
-}
-
-/* Free the storage used in the hash table for temporary
- environment variables. PUSHF is a function to be called
- to free each hash table entry. It takes care of pushing variables
- to previous scopes if appropriate. PUSHF stores names of variables
- that require special handling (e.g., IFS) on tempvar_list, so this
- function can call stupidly_hack_special_variables on all the
- variables in the list when the temporary hash table is destroyed. */
-static void
-dispose_temporary_env (pushf)
- sh_free_func_t *pushf;
-{
- int i;
-
- tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1);
- tempvar_list[tvlist_ind = 0] = 0;
-
- hash_flush (temporary_env, pushf);
- hash_dispose (temporary_env);
- temporary_env = (HASH_TABLE *)NULL;
-
- tempvar_list[tvlist_ind] = 0;
-
- array_needs_making = 1;
-
-#if 0
- sv_ifs ("IFS"); /* XXX here for now -- check setifs in assign_in_env */
-#endif
- for (i = 0; i < tvlist_ind; i++)
- stupidly_hack_special_variables (tempvar_list[i]);
-
- strvec_dispose (tempvar_list);
- tempvar_list = 0;
- tvlist_ind = 0;
-}
-
-void
-dispose_used_env_vars ()
-{
- if (temporary_env)
- {
- dispose_temporary_env (propagate_temp_var);
- maybe_make_export_env ();
- }
-}
-
-/* Take all of the shell variables in the temporary environment HASH_TABLE
- and make shell variables from them at the current variable context. */
-void
-merge_temporary_env ()
-{
- if (temporary_env)
- dispose_temporary_env (push_temp_var);
-}
-
-/* **************************************************************** */
-/* */
-/* Creating and manipulating the environment */
-/* */
-/* **************************************************************** */
-
-static inline char *
-mk_env_string (name, value)
- const char *name, *value;
-{
- int name_len, value_len;
- char *p;
-
- name_len = strlen (name);
- value_len = STRLEN (value);
- p = (char *)xmalloc (2 + name_len + value_len);
- strcpy (p, name);
- p[name_len] = '=';
- if (value && *value)
- strcpy (p + name_len + 1, value);
- else
- p[name_len + 1] = '\0';
- return (p);
-}
-
-#ifdef DEBUG
-/* Debugging */
-static int
-valid_exportstr (v)
- SHELL_VAR *v;
-{
- char *s;
-
- s = v->exportstr;
- if (s == 0)
- {
- internal_error (_("%s has null exportstr"), v->name);
- return (0);
- }
- if (legal_variable_starter ((unsigned char)*s) == 0)
- {
- internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
- return (0);
- }
- for (s = v->exportstr + 1; s && *s; s++)
- {
- if (*s == '=')
- break;
- if (legal_variable_char ((unsigned char)*s) == 0)
- {
- internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
- return (0);
- }
- }
- if (*s != '=')
- {
- internal_error (_("no `=' in exportstr for %s"), v->name);
- return (0);
- }
- return (1);
-}
-#endif
-
-static char **
-make_env_array_from_var_list (vars)
- SHELL_VAR **vars;
-{
- register int i, list_index;
- register SHELL_VAR *var;
- char **list, *value;
-
- list = strvec_create ((1 + strvec_len ((char **)vars)));
-
-#define USE_EXPORTSTR (value == var->exportstr)
-
- for (i = 0, list_index = 0; var = vars[i]; i++)
- {
-#if defined (__CYGWIN__)
- /* We don't use the exportstr stuff on Cygwin at all. */
- INVALIDATE_EXPORTSTR (var);
-#endif
- if (var->exportstr)
- value = var->exportstr;
- else if (function_p (var))
- value = named_function_string ((char *)NULL, function_cell (var), 0);
-#if defined (ARRAY_VARS)
- else if (array_p (var))
-# if ARRAY_EXPORT
- value = array_to_assignment_string (array_cell (var));
-# else
- continue; /* XXX array vars cannot yet be exported */
-# endif /* ARRAY_EXPORT */
- else if (assoc_p (var))
-# if 0
- value = assoc_to_assignment_string (assoc_cell (var));
-# else
- continue; /* XXX associative array vars cannot yet be exported */
-# endif
-#endif
- else
- value = value_cell (var);
-
- if (value)
- {
- /* Gee, I'd like to get away with not using savestring() if we're
- using the cached exportstr... */
- list[list_index] = USE_EXPORTSTR ? savestring (value)
- : mk_env_string (var->name, value);
-
- if (USE_EXPORTSTR == 0)
- SAVE_EXPORTSTR (var, list[list_index]);
-
- list_index++;
-#undef USE_EXPORTSTR
-
-#if 0 /* not yet */
-#if defined (ARRAY_VARS)
- if (array_p (var) || assoc_p (var))
- free (value);
-#endif
-#endif
- }
- }
-
- list[list_index] = (char *)NULL;
- return (list);
-}
-
-/* Make an array of assignment statements from the hash table
- HASHED_VARS which contains SHELL_VARs. Only visible, exported
- variables are eligible. */
-static char **
-make_var_export_array (vcxt)
- VAR_CONTEXT *vcxt;
-{
- char **list;
- SHELL_VAR **vars;
-
-#if 0
- vars = map_over (visible_and_exported, vcxt);
-#else
- vars = map_over (export_environment_candidate, vcxt);
-#endif
-
- if (vars == 0)
- return (char **)NULL;
-
- list = make_env_array_from_var_list (vars);
-
- free (vars);
- return (list);
-}
-
-static char **
-make_func_export_array ()
-{
- char **list;
- SHELL_VAR **vars;
-
- vars = map_over_funcs (visible_and_exported);
- if (vars == 0)
- return (char **)NULL;
-
- list = make_env_array_from_var_list (vars);
-
- free (vars);
- return (list);
-}
-
-/* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */
-#define add_to_export_env(envstr,do_alloc) \
-do \
- { \
- if (export_env_index >= (export_env_size - 1)) \
- { \
- export_env_size += 16; \
- export_env = strvec_resize (export_env, export_env_size); \
- environ = export_env; \
- } \
- export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \
- export_env[export_env_index] = (char *)NULL; \
- } while (0)
-
-/* Add ASSIGN to EXPORT_ENV, or supercede a previous assignment in the
- array with the same left-hand side. Return the new EXPORT_ENV. */
-char **
-add_or_supercede_exported_var (assign, do_alloc)
- char *assign;
- int do_alloc;
-{
- register int i;
- int equal_offset;
-
- equal_offset = assignment (assign, 0);
- if (equal_offset == 0)
- return (export_env);
-
- /* If this is a function, then only supersede the function definition.
- We do this by including the `=() {' in the comparison, like
- initialize_shell_variables does. */
- if (assign[equal_offset + 1] == '(' &&
- strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */
- equal_offset += 4;
-
- for (i = 0; i < export_env_index; i++)
- {
- if (STREQN (assign, export_env[i], equal_offset + 1))
- {
- free (export_env[i]);
- export_env[i] = do_alloc ? savestring (assign) : assign;
- return (export_env);
- }
- }
- add_to_export_env (assign, do_alloc);
- return (export_env);
-}
-
-static void
-add_temp_array_to_env (temp_array, do_alloc, do_supercede)
- char **temp_array;
- int do_alloc, do_supercede;
-{
- register int i;
-
- if (temp_array == 0)
- return;
-
- for (i = 0; temp_array[i]; i++)
- {
- if (do_supercede)
- export_env = add_or_supercede_exported_var (temp_array[i], do_alloc);
- else
- add_to_export_env (temp_array[i], do_alloc);
- }
-
- free (temp_array);
-}
-
-/* Make the environment array for the command about to be executed, if the
- array needs making. Otherwise, do nothing. If a shell action could
- change the array that commands receive for their environment, then the
- code should `array_needs_making++'.
-
- The order to add to the array is:
- temporary_env
- list of var contexts whose head is shell_variables
- shell_functions
-
- This is the shell variable lookup order. We add only new variable
- names at each step, which allows local variables and variables in
- the temporary environments to shadow variables in the global (or
- any previous) scope.
-*/
-
-static int
-n_shell_variables ()
-{
- VAR_CONTEXT *vc;
- int n;
-
- for (n = 0, vc = shell_variables; vc; vc = vc->down)
- n += HASH_ENTRIES (vc->table);
- return n;
-}
-
-int
-chkexport (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v && exported_p (v))
- {
- array_needs_making = 1;
- maybe_make_export_env ();
- return 1;
- }
- return 0;
-}
-
-void
-maybe_make_export_env ()
-{
- register char **temp_array;
- int new_size;
- VAR_CONTEXT *tcxt;
-
- if (array_needs_making)
- {
- if (export_env)
- strvec_flush (export_env);
-
- /* Make a guess based on how many shell variables and functions we
- have. Since there will always be array variables, and array
- variables are not (yet) exported, this will always be big enough
- for the exported variables and functions. */
- new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 +
- HASH_ENTRIES (temporary_env);
- if (new_size > export_env_size)
- {
- export_env_size = new_size;
- export_env = strvec_resize (export_env, export_env_size);
- environ = export_env;
- }
- export_env[export_env_index = 0] = (char *)NULL;
-
- /* Make a dummy variable context from the temporary_env, stick it on
- the front of shell_variables, call make_var_export_array on the
- whole thing to flatten it, and convert the list of SHELL_VAR *s
- to the form needed by the environment. */
- if (temporary_env)
- {
- tcxt = new_var_context ((char *)NULL, 0);
- tcxt->table = temporary_env;
- tcxt->down = shell_variables;
- }
- else
- tcxt = shell_variables;
-
- temp_array = make_var_export_array (tcxt);
- if (temp_array)
- add_temp_array_to_env (temp_array, 0, 0);
-
- if (tcxt != shell_variables)
- free (tcxt);
-
-#if defined (RESTRICTED_SHELL)
- /* Restricted shells may not export shell functions. */
- temp_array = restricted ? (char **)0 : make_func_export_array ();
-#else
- temp_array = make_func_export_array ();
-#endif
- if (temp_array)
- add_temp_array_to_env (temp_array, 0, 0);
-
- array_needs_making = 0;
- }
-}
-
-/* This is an efficiency hack. PWD and OLDPWD are auto-exported, so
- we will need to remake the exported environment every time we
- change directories. `_' is always put into the environment for
- every external command, so without special treatment it will always
- cause the environment to be remade.
-
- If there is no other reason to make the exported environment, we can
- just update the variables in place and mark the exported environment
- as no longer needing a remake. */
-void
-update_export_env_inplace (env_prefix, preflen, value)
- char *env_prefix;
- int preflen;
- char *value;
-{
- char *evar;
-
- evar = (char *)xmalloc (STRLEN (value) + preflen + 1);
- strcpy (evar, env_prefix);
- if (value)
- strcpy (evar + preflen, value);
- export_env = add_or_supercede_exported_var (evar, 0);
-}
-
-/* We always put _ in the environment as the name of this command. */
-void
-put_command_name_into_env (command_name)
- char *command_name;
-{
- update_export_env_inplace ("_=", 2, command_name);
-}
-
-/* **************************************************************** */
-/* */
-/* Managing variable contexts */
-/* */
-/* **************************************************************** */
-
-/* Allocate and return a new variable context with NAME and FLAGS.
- NAME can be NULL. */
-
-VAR_CONTEXT *
-new_var_context (name, flags)
- char *name;
- int flags;
-{
- VAR_CONTEXT *vc;
-
- vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT));
- vc->name = name ? savestring (name) : (char *)NULL;
- vc->scope = variable_context;
- vc->flags = flags;
-
- vc->up = vc->down = (VAR_CONTEXT *)NULL;
- vc->table = (HASH_TABLE *)NULL;
-
- return vc;
-}
-
-/* Free a variable context and its data, including the hash table. Dispose
- all of the variables. */
-void
-dispose_var_context (vc)
- VAR_CONTEXT *vc;
-{
- FREE (vc->name);
-
- if (vc->table)
- {
- delete_all_variables (vc->table);
- hash_dispose (vc->table);
- }
-
- free (vc);
-}
-
-/* Set VAR's scope level to the current variable context. */
-static int
-set_context (var)
- SHELL_VAR *var;
-{
- return (var->context = variable_context);
-}
-
-/* Make a new variable context with NAME and FLAGS and a HASH_TABLE of
- temporary variables, and push it onto shell_variables. This is
- for shell functions. */
-VAR_CONTEXT *
-push_var_context (name, flags, tempvars)
- char *name;
- int flags;
- HASH_TABLE *tempvars;
-{
- VAR_CONTEXT *vc;
-
- vc = new_var_context (name, flags);
- vc->table = tempvars;
- if (tempvars)
- {
- /* Have to do this because the temp environment was created before
- variable_context was incremented. */
- flatten (tempvars, set_context, (VARLIST *)NULL, 0);
- vc->flags |= VC_HASTMPVAR;
- }
- vc->down = shell_variables;
- shell_variables->up = vc;
-
- return (shell_variables = vc);
-}
-
-static void
-push_func_var (data)
- PTR_T data;
-{
- SHELL_VAR *var, *v;
-
- var = (SHELL_VAR *)data;
-
- if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate)))
- {
- /* Make sure we have a hash table to store the variable in while it is
- being propagated down to the global variables table. Create one if
- we have to */
- if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0)
- shell_variables->table = hash_create (0);
- /* XXX - should we set v->context here? */
- v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
- if (shell_variables == global_variables)
- var->attributes &= ~(att_tempvar|att_propagate);
- else
- shell_variables->flags |= VC_HASTMPVAR;
- v->attributes |= var->attributes;
- }
- else
- stupidly_hack_special_variables (var->name); /* XXX */
-
- dispose_variable (var);
-}
-
-/* Pop the top context off of VCXT and dispose of it, returning the rest of
- the stack. */
-void
-pop_var_context ()
-{
- VAR_CONTEXT *ret, *vcxt;
-
- vcxt = shell_variables;
- if (vc_isfuncenv (vcxt) == 0)
- {
- internal_error (_("pop_var_context: head of shell_variables not a function context"));
- return;
- }
-
- if (ret = vcxt->down)
- {
- ret->up = (VAR_CONTEXT *)NULL;
- shell_variables = ret;
- if (vcxt->table)
- hash_flush (vcxt->table, push_func_var);
- dispose_var_context (vcxt);
- }
- else
- internal_error (_("pop_var_context: no global_variables context"));
-}
-
-/* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and
- all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */
-void
-delete_all_contexts (vcxt)
- VAR_CONTEXT *vcxt;
-{
- VAR_CONTEXT *v, *t;
-
- for (v = vcxt; v != global_variables; v = t)
- {
- t = v->down;
- dispose_var_context (v);
- }
-
- delete_all_variables (global_variables->table);
- shell_variables = global_variables;
-}
-
-/* **************************************************************** */
-/* */
-/* Pushing and Popping temporary variable scopes */
-/* */
-/* **************************************************************** */
-
-VAR_CONTEXT *
-push_scope (flags, tmpvars)
- int flags;
- HASH_TABLE *tmpvars;
-{
- return (push_var_context ((char *)NULL, flags, tmpvars));
-}
-
-static void
-push_exported_var (data)
- PTR_T data;
-{
- SHELL_VAR *var, *v;
-
- var = (SHELL_VAR *)data;
-
- /* If a temp var had its export attribute set, or it's marked to be
- propagated, bind it in the previous scope before disposing it. */
- /* XXX - This isn't exactly right, because all tempenv variables have the
- export attribute set. */
-#if 0
- if (exported_p (var) || (var->attributes & att_propagate))
-#else
- if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate))
-#endif
- {
- var->attributes &= ~att_tempvar; /* XXX */
- v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
- if (shell_variables == global_variables)
- var->attributes &= ~att_propagate;
- v->attributes |= var->attributes;
- }
- else
- stupidly_hack_special_variables (var->name); /* XXX */
-
- dispose_variable (var);
-}
-
-void
-pop_scope (is_special)
- int is_special;
-{
- VAR_CONTEXT *vcxt, *ret;
-
- vcxt = shell_variables;
- if (vc_istempscope (vcxt) == 0)
- {
- internal_error (_("pop_scope: head of shell_variables not a temporary environment scope"));
- return;
- }
-
- ret = vcxt->down;
- if (ret)
- ret->up = (VAR_CONTEXT *)NULL;
-
- shell_variables = ret;
-
- /* Now we can take care of merging variables in VCXT into set of scopes
- whose head is RET (shell_variables). */
- FREE (vcxt->name);
- if (vcxt->table)
- {
- if (is_special)
- hash_flush (vcxt->table, push_func_var);
- else
- hash_flush (vcxt->table, push_exported_var);
- hash_dispose (vcxt->table);
- }
- free (vcxt);
-
- sv_ifs ("IFS"); /* XXX here for now */
-}
-
-/* **************************************************************** */
-/* */
-/* Pushing and Popping function contexts */
-/* */
-/* **************************************************************** */
-
-static WORD_LIST **dollar_arg_stack = (WORD_LIST **)NULL;
-static int dollar_arg_stack_slots;
-static int dollar_arg_stack_index;
-
-/* XXX - we might want to consider pushing and popping the `getopts' state
- when we modify the positional parameters. */
-void
-push_context (name, is_subshell, tempvars)
- char *name; /* function name */
- int is_subshell;
- HASH_TABLE *tempvars;
-{
- if (is_subshell == 0)
- push_dollar_vars ();
- variable_context++;
- push_var_context (name, VC_FUNCENV, tempvars);
-}
-
-/* Only called when subshell == 0, so we don't need to check, and can
- unconditionally pop the dollar vars off the stack. */
-void
-pop_context ()
-{
- pop_dollar_vars ();
- variable_context--;
- pop_var_context ();
-
- sv_ifs ("IFS"); /* XXX here for now */
-}
-
-/* Save the existing positional parameters on a stack. */
-void
-push_dollar_vars ()
-{
- if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots)
- {
- dollar_arg_stack = (WORD_LIST **)
- xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10)
- * sizeof (WORD_LIST *));
- }
- dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args ();
- dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
-}
-
-/* Restore the positional parameters from our stack. */
-void
-pop_dollar_vars ()
-{
- if (!dollar_arg_stack || dollar_arg_stack_index == 0)
- return;
-
- remember_args (dollar_arg_stack[--dollar_arg_stack_index], 1);
- dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
- dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
- set_dollar_vars_unchanged ();
-}
-
-void
-dispose_saved_dollar_vars ()
-{
- if (!dollar_arg_stack || dollar_arg_stack_index == 0)
- return;
-
- dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
- dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
-}
-
-/* Manipulate the special BASH_ARGV and BASH_ARGC variables. */
-
-void
-push_args (list)
- WORD_LIST *list;
-{
-#if defined (ARRAY_VARS) && defined (DEBUGGER)
- SHELL_VAR *bash_argv_v, *bash_argc_v;
- ARRAY *bash_argv_a, *bash_argc_a;
- WORD_LIST *l;
- arrayind_t i;
- char *t;
-
- GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
- GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
-
- for (l = list, i = 0; l; l = l->next, i++)
- array_push (bash_argv_a, l->word->word);
-
- t = itos (i);
- array_push (bash_argc_a, t);
- free (t);
-#endif /* ARRAY_VARS && DEBUGGER */
-}
-
-/* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC
- array and use that value as the count of elements to remove from
- BASH_ARGV. */
-void
-pop_args ()
-{
-#if defined (ARRAY_VARS) && defined (DEBUGGER)
- SHELL_VAR *bash_argv_v, *bash_argc_v;
- ARRAY *bash_argv_a, *bash_argc_a;
- ARRAY_ELEMENT *ce;
- intmax_t i;
-
- GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
- GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
-
- ce = array_shift (bash_argc_a, 1, 0);
- if (ce == 0 || legal_number (element_value (ce), &i) == 0)
- i = 0;
-
- for ( ; i > 0; i--)
- array_pop (bash_argv_a);
- array_dispose_element (ce);
-#endif /* ARRAY_VARS && DEBUGGER */
-}
-
-/*************************************************
- * *
- * Functions to manage special variables *
- * *
- *************************************************/
-
-/* Extern declarations for variables this code has to manage. */
-extern int eof_encountered, eof_encountered_limit, ignoreeof;
-
-#if defined (READLINE)
-extern int hostname_list_initialized;
-#endif
-
-/* An alist of name.function for each special variable. Most of the
- functions don't do much, and in fact, this would be faster with a
- switch statement, but by the end of this file, I am sick of switch
- statements. */
-
-#define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0
-
-/* This table will be sorted with qsort() the first time it's accessed. */
-struct name_and_function {
- char *name;
- sh_sv_func_t *function;
-};
-
-static struct name_and_function special_vars[] = {
- { "BASH_COMPAT", sv_shcompat },
- { "BASH_XTRACEFD", sv_xtracefd },
-
-#if defined (JOB_CONTROL)
- { "CHILD_MAX", sv_childmax },
-#endif
-
-#if defined (READLINE)
-# if defined (STRICT_POSIX)
- { "COLUMNS", sv_winsize },
-# endif
- { "COMP_WORDBREAKS", sv_comp_wordbreaks },
-#endif
-
- { "FUNCNEST", sv_funcnest },
-
- { "GLOBIGNORE", sv_globignore },
-
-#if defined (HISTORY)
- { "HISTCONTROL", sv_history_control },
- { "HISTFILESIZE", sv_histsize },
- { "HISTIGNORE", sv_histignore },
- { "HISTSIZE", sv_histsize },
- { "HISTTIMEFORMAT", sv_histtimefmt },
-#endif
-
-#if defined (__CYGWIN__)
- { "HOME", sv_home },
-#endif
-
-#if defined (READLINE)
- { "HOSTFILE", sv_hostfile },
-#endif
-
- { "IFS", sv_ifs },
- { "IGNOREEOF", sv_ignoreeof },
-
- { "LANG", sv_locale },
- { "LC_ALL", sv_locale },
- { "LC_COLLATE", sv_locale },
- { "LC_CTYPE", sv_locale },
- { "LC_MESSAGES", sv_locale },
- { "LC_NUMERIC", sv_locale },
- { "LC_TIME", sv_locale },
-
-#if defined (READLINE) && defined (STRICT_POSIX)
- { "LINES", sv_winsize },
-#endif
-
- { "MAIL", sv_mail },
- { "MAILCHECK", sv_mail },
- { "MAILPATH", sv_mail },
-
- { "OPTERR", sv_opterr },
- { "OPTIND", sv_optind },
-
- { "PATH", sv_path },
- { "POSIXLY_CORRECT", sv_strict_posix },
-
-#if defined (READLINE)
- { "TERM", sv_terminal },
- { "TERMCAP", sv_terminal },
- { "TERMINFO", sv_terminal },
-#endif /* READLINE */
-
- { "TEXTDOMAIN", sv_locale },
- { "TEXTDOMAINDIR", sv_locale },
-
-#if defined (HAVE_TZSET)
- { "TZ", sv_tz },
-#endif
-
-#if defined (HISTORY) && defined (BANG_HISTORY)
- { "histchars", sv_histchars },
-#endif /* HISTORY && BANG_HISTORY */
-
- { "ignoreeof", sv_ignoreeof },
-
- { (char *)0, (sh_sv_func_t *)0 }
-};
-
-#define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1)
-
-static int
-sv_compare (sv1, sv2)
- struct name_and_function *sv1, *sv2;
-{
- int r;
-
- if ((r = sv1->name[0] - sv2->name[0]) == 0)
- r = strcmp (sv1->name, sv2->name);
- return r;
-}
-
-static inline int
-find_special_var (name)
- const char *name;
-{
- register int i, r;
-
- for (i = 0; special_vars[i].name; i++)
- {
- r = special_vars[i].name[0] - name[0];
- if (r == 0)
- r = strcmp (special_vars[i].name, name);
- if (r == 0)
- return i;
- else if (r > 0)
- /* Can't match any of rest of elements in sorted list. Take this out
- if it causes problems in certain environments. */
- break;
- }
- return -1;
-}
-
-/* The variable in NAME has just had its state changed. Check to see if it
- is one of the special ones where something special happens. */
-void
-stupidly_hack_special_variables (name)
- char *name;
-{
- static int sv_sorted = 0;
- int i;
-
- if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */
- {
- qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]),
- (QSFUNC *)sv_compare);
- sv_sorted = 1;
- }
-
- i = find_special_var (name);
- if (i != -1)
- (*(special_vars[i].function)) (name);
-}
-
-/* Special variables that need hooks to be run when they are unset as part
- of shell reinitialization should have their sv_ functions run here. */
-void
-reinit_special_variables ()
-{
-#if defined (READLINE)
- sv_comp_wordbreaks ("COMP_WORDBREAKS");
-#endif
- sv_globignore ("GLOBIGNORE");
- sv_opterr ("OPTERR");
-}
-
-void
-sv_ifs (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable ("IFS");
- setifs (v);
-}
-
-/* What to do just after the PATH variable has changed. */
-void
-sv_path (name)
- char *name;
-{
- /* hash -r */
- phash_flush ();
-}
-
-/* What to do just after one of the MAILxxxx variables has changed. NAME
- is the name of the variable. This is called with NAME set to one of
- MAIL, MAILCHECK, or MAILPATH. */
-void
-sv_mail (name)
- char *name;
-{
- /* If the time interval for checking the files has changed, then
- reset the mail timer. Otherwise, one of the pathname vars
- to the users mailbox has changed, so rebuild the array of
- filenames. */
- if (name[4] == 'C') /* if (strcmp (name, "MAILCHECK") == 0) */
- reset_mail_timer ();
- else
- {
- free_mail_files ();
- remember_mail_dates ();
- }
-}
-
-void
-sv_funcnest (name)
- char *name;
-{
- SHELL_VAR *v;
- intmax_t num;
-
- v = find_variable (name);
- if (v == 0)
- funcnest_max = 0;
- else if (legal_number (value_cell (v), &num) == 0)
- funcnest_max = 0;
- else
- funcnest_max = num;
-}
-
-/* What to do when GLOBIGNORE changes. */
-void
-sv_globignore (name)
- char *name;
-{
- if (privileged_mode == 0)
- setup_glob_ignore (name);
-}
-
-#if defined (READLINE)
-void
-sv_comp_wordbreaks (name)
- char *name;
-{
- SHELL_VAR *sv;
-
- sv = find_variable (name);
- if (sv == 0)
- reset_completer_word_break_chars ();
-}
-
-/* What to do just after one of the TERMxxx variables has changed.
- If we are an interactive shell, then try to reset the terminal
- information in readline. */
-void
-sv_terminal (name)
- char *name;
-{
- if (interactive_shell && no_line_editing == 0)
- rl_reset_terminal (get_string_value ("TERM"));
-}
-
-void
-sv_hostfile (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v == 0)
- clear_hostname_list ();
- else
- hostname_list_initialized = 0;
-}
-
-#if defined (STRICT_POSIX)
-/* In strict posix mode, we allow assignments to LINES and COLUMNS (and values
- found in the initial environment) to override the terminal size reported by
- the kernel. */
-void
-sv_winsize (name)
- char *name;
-{
- SHELL_VAR *v;
- intmax_t xd;
- int d;
-
- if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing)
- return;
-
- v = find_variable (name);
- if (v == 0 || var_isnull (v))
- rl_reset_screen_size ();
- else
- {
- if (legal_number (value_cell (v), &xd) == 0)
- return;
- winsize_assignment = 1;
- d = xd; /* truncate */
- if (name[0] == 'L') /* LINES */
- rl_set_screen_size (d, -1);
- else /* COLUMNS */
- rl_set_screen_size (-1, d);
- winsize_assignment = 0;
- }
-}
-#endif /* STRICT_POSIX */
-#endif /* READLINE */
-
-/* Update the value of HOME in the export environment so tilde expansion will
- work on cygwin. */
-#if defined (__CYGWIN__)
-sv_home (name)
- char *name;
-{
- array_needs_making = 1;
- maybe_make_export_env ();
-}
-#endif
-
-#if defined (HISTORY)
-/* What to do after the HISTSIZE or HISTFILESIZE variables change.
- If there is a value for this HISTSIZE (and it is numeric), then stifle
- the history. Otherwise, if there is NO value for this variable,
- unstifle the history. If name is HISTFILESIZE, and its value is
- numeric, truncate the history file to hold no more than that many
- lines. */
-void
-sv_histsize (name)
- char *name;
-{
- char *temp;
- intmax_t num;
- int hmax;
-
- temp = get_string_value (name);
-
- if (temp && *temp)
- {
- if (legal_number (temp, &num))
- {
- hmax = num;
- if (hmax < 0 && name[4] == 'S')
- unstifle_history (); /* unstifle history if HISTSIZE < 0 */
- else if (name[4] == 'S')
- {
- stifle_history (hmax);
- hmax = where_history ();
- if (history_lines_this_session > hmax)
- history_lines_this_session = hmax;
- }
- else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */
- {
- history_truncate_file (get_string_value ("HISTFILE"), hmax);
- if (hmax <= history_lines_in_file)
- history_lines_in_file = hmax;
- }
- }
- }
- else if (name[4] == 'S')
- unstifle_history ();
-}
-
-/* What to do after the HISTIGNORE variable changes. */
-void
-sv_histignore (name)
- char *name;
-{
- setup_history_ignore (name);
-}
-
-/* What to do after the HISTCONTROL variable changes. */
-void
-sv_history_control (name)
- char *name;
-{
- char *temp;
- char *val;
- int tptr;
-
- history_control = 0;
- temp = get_string_value (name);
-
- if (temp == 0 || *temp == 0)
- return;
-
- tptr = 0;
- while (val = extract_colon_unit (temp, &tptr))
- {
- if (STREQ (val, "ignorespace"))
- history_control |= HC_IGNSPACE;
- else if (STREQ (val, "ignoredups"))
- history_control |= HC_IGNDUPS;
- else if (STREQ (val, "ignoreboth"))
- history_control |= HC_IGNBOTH;
- else if (STREQ (val, "erasedups"))
- history_control |= HC_ERASEDUPS;
-
- free (val);
- }
-}
-
-#if defined (BANG_HISTORY)
-/* Setting/unsetting of the history expansion character. */
-void
-sv_histchars (name)
- char *name;
-{
- char *temp;
-
- temp = get_string_value (name);
- if (temp)
- {
- history_expansion_char = *temp;
- if (temp[0] && temp[1])
- {
- history_subst_char = temp[1];
- if (temp[2])
- history_comment_char = temp[2];
- }
- }
- else
- {
- history_expansion_char = '!';
- history_subst_char = '^';
- history_comment_char = '#';
- }
-}
-#endif /* BANG_HISTORY */
-
-void
-sv_histtimefmt (name)
- char *name;
-{
- SHELL_VAR *v;
-
- if (v = find_variable (name))
- {
- if (history_comment_char == 0)
- history_comment_char = '#';
- }
- history_write_timestamps = (v != 0);
-}
-#endif /* HISTORY */
-
-#if defined (HAVE_TZSET)
-void
-sv_tz (name)
- char *name;
-{
- if (chkexport (name))
- tzset ();
-}
-#endif
-
-/* If the variable exists, then the value of it can be the number
- of times we actually ignore the EOF. The default is small,
- (smaller than csh, anyway). */
-void
-sv_ignoreeof (name)
- char *name;
-{
- SHELL_VAR *tmp_var;
- char *temp;
-
- eof_encountered = 0;
-
- tmp_var = find_variable (name);
- ignoreeof = tmp_var != 0;
- temp = tmp_var ? value_cell (tmp_var) : (char *)NULL;
- if (temp)
- eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10;
- set_shellopts (); /* make sure `ignoreeof' is/is not in $SHELLOPTS */
-}
-
-void
-sv_optind (name)
- char *name;
-{
- char *tt;
- int s;
-
- tt = get_string_value ("OPTIND");
- if (tt && *tt)
- {
- s = atoi (tt);
-
- /* According to POSIX, setting OPTIND=1 resets the internal state
- of getopt (). */
- if (s < 0 || s == 1)
- s = 0;
- }
- else
- s = 0;
- getopts_reset (s);
-}
-
-void
-sv_opterr (name)
- char *name;
-{
- char *tt;
-
- tt = get_string_value ("OPTERR");
- sh_opterr = (tt && *tt) ? atoi (tt) : 1;
-}
-
-void
-sv_strict_posix (name)
- char *name;
-{
- SET_INT_VAR (name, posixly_correct);
- posix_initialize (posixly_correct);
-#if defined (READLINE)
- if (interactive_shell)
- posix_readline_initialize (posixly_correct);
-#endif /* READLINE */
- set_shellopts (); /* make sure `posix' is/is not in $SHELLOPTS */
-}
-
-void
-sv_locale (name)
- char *name;
-{
- char *v;
- int r;
-
- v = get_string_value (name);
- if (name[0] == 'L' && name[1] == 'A') /* LANG */
- r = set_lang (name, v);
- else
- r = set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */
-
-#if 1
- if (r == 0 && posixly_correct)
- last_command_exit_value = 1;
-#endif
-}
-
-#if defined (ARRAY_VARS)
-void
-set_pipestatus_array (ps, nproc)
- int *ps;
- int nproc;
-{
- SHELL_VAR *v;
- ARRAY *a;
- ARRAY_ELEMENT *ae;
- register int i;
- char *t, tbuf[INT_STRLEN_BOUND(int) + 1];
-
- v = find_variable ("PIPESTATUS");
- if (v == 0)
- v = make_new_array_variable ("PIPESTATUS");
- if (array_p (v) == 0)
- return; /* Do nothing if not an array variable. */
- a = array_cell (v);
-
- if (a == 0 || array_num_elements (a) == 0)
- {
- for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */
- {
- t = inttostr (ps[i], tbuf, sizeof (tbuf));
- array_insert (a, i, t);
- }
- return;
- }
-
- /* Fast case */
- if (array_num_elements (a) == nproc && nproc == 1)
- {
- ae = element_forw (a->head);
- free (element_value (ae));
- ae->value = itos (ps[0]);
- }
- else if (array_num_elements (a) <= nproc)
- {
- /* modify in array_num_elements members in place, then add */
- ae = a->head;
- for (i = 0; i < array_num_elements (a); i++)
- {
- ae = element_forw (ae);
- free (element_value (ae));
- ae->value = itos (ps[i]);
- }
- /* add any more */
- for ( ; i < nproc; i++)
- {
- t = inttostr (ps[i], tbuf, sizeof (tbuf));
- array_insert (a, i, t);
- }
- }
- else
- {
- /* deleting elements. it's faster to rebuild the array. */
- array_flush (a);
- for (i = 0; ps[i] != -1; i++)
- {
- t = inttostr (ps[i], tbuf, sizeof (tbuf));
- array_insert (a, i, t);
- }
- }
-}
-
-ARRAY *
-save_pipestatus_array ()
-{
- SHELL_VAR *v;
- ARRAY *a, *a2;
-
- v = find_variable ("PIPESTATUS");
- if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
- return ((ARRAY *)NULL);
-
- a = array_cell (v);
- a2 = array_copy (array_cell (v));
-
- return a2;
-}
-
-void
-restore_pipestatus_array (a)
- ARRAY *a;
-{
- SHELL_VAR *v;
- ARRAY *a2;
-
- v = find_variable ("PIPESTATUS");
- /* XXX - should we still assign even if existing value is NULL? */
- if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
- return;
-
- a2 = array_cell (v);
- var_setarray (v, a);
-
- array_dispose (a2);
-}
-#endif
-
-void
-set_pipestatus_from_exit (s)
- int s;
-{
-#if defined (ARRAY_VARS)
- static int v[2] = { 0, -1 };
-
- v[0] = s;
- set_pipestatus_array (v, 1);
-#endif
-}
-
-void
-sv_xtracefd (name)
- char *name;
-{
- SHELL_VAR *v;
- char *t, *e;
- int fd;
- FILE *fp;
-
- v = find_variable (name);
- if (v == 0)
- {
- xtrace_reset ();
- return;
- }
-
- t = value_cell (v);
- if (t == 0 || *t == 0)
- xtrace_reset ();
- else
- {
- fd = (int)strtol (t, &e, 10);
- if (e != t && *e == '\0' && sh_validfd (fd))
- {
- fp = fdopen (fd, "w");
- if (fp == 0)
- internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v));
- else
- xtrace_set (fd, fp);
- }
- else
- internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v));
- }
-}
-
-#define MIN_COMPAT_LEVEL 31
-
-void
-sv_shcompat (name)
- char *name;
-{
- SHELL_VAR *v;
- char *val;
- int tens, ones, compatval;
-
- v = find_variable (name);
- if (v == 0)
- {
- shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
- set_compatibility_opts ();
- return;
- }
- val = value_cell (v);
- if (val == 0 || *val == '\0')
- {
- shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
- set_compatibility_opts ();
- return;
- }
- /* Handle decimal-like compatibility version specifications: 4.2 */
- if (isdigit (val[0]) && val[1] == '.' && isdigit (val[2]) && val[3] == 0)
- {
- tens = val[0] - '0';
- ones = val[2] - '0';
- compatval = tens*10 + ones;
- }
- /* Handle integer-like compatibility version specifications: 42 */
- else if (isdigit (val[0]) && isdigit (val[1]) && val[2] == 0)
- {
- tens = val[0] - '0';
- ones = val[1] - '0';
- compatval = tens*10 + ones;
- }
- else
- {
-compat_error:
- internal_error (_("%s: %s: compatibility value out of range"), name, val);
- shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
- set_compatibility_opts ();
- return;
- }
-
- if (compatval < MIN_COMPAT_LEVEL || compatval > DEFAULT_COMPAT_LEVEL)
- goto compat_error;
-
- shell_compatibility_level = compatval;
- set_compatibility_opts ();
-}
-
-#if defined (JOB_CONTROL)
-void
-sv_childmax (name)
- char *name;
-{
- char *tt;
- int s;
-
- tt = get_string_value (name);
- s = (tt && *tt) ? atoi (tt) : 0;
- set_maxchild (s);
-}
-#endif
projects / thirdparty / bash.git / commitdiff
